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Pennsylvania bird life; a manual of the birds of Pennsylvania; treating especially of their food, from examinations of several thousand stomachs, made during all seasons of the year, with descriptions of the birds, their nests, eggs and habits - Warren, Benjamin Harry, 1858 -1926 (Penn'a., Pub by the author, 1892)

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Pests not known to occur in the United States or of limited distribution no.19 Mexican fruit fly - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agricultures, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1982)

Pests not known to occur in the United States or of limited distribution no.25 Egyptian cottonworm - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agricultures, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1982)

Pests not known to occur in the United States or of limited distribution no.62 Summer fruit tortrix moth - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1985)

Pests not known to occur in the United States or of limited distribution no.18 South American fruit fly - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agricultures, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1982)

Pests not known to occur in the United States or of limited distribution no.63 Pear leaf blister moth - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1985)

Pests not known to occur in the United States or of limited distribution no.20 Oriental fruit fly - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agricultures, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1982)

Pests not known to occur in the United States or of limited distribution no.15 Citrus blackfly - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agricultures, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1982)

Pests not known to occur in the United States or of limited distribution no.64 A curculionid weevil - Whitehead, Donald R. (United States Department of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1985)

Pests not known to occur in the United States or of limited distribution no.21 Seychelles fluted scale - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agricultures, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1982)

Pests not known to occur in the United States or of limited distribution no.50 Light-brown apple moth - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1984)

Pests not known to occur in the United States or of limited distribution no.26 Mediterranean fruit fly - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (United States Department of Agricultures, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1982)

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Pflanzen-Atlas nach dem Linné'schen System - Hoffmann, Carl, 1802 -1883 (Jul. Hoffmann, 1881)

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Die Pflanzendecke Österreich-Ungarns. Auf Grund fremder und eigener Forschungen geschildert - Hayek, August von, 1871 -1928 (F. Deuticke, 1914)

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Pflanzengeographie, nach Alexander von Humboldt's werke ueber die geographische Vertheilhung der Gewächse : mit Anmerkungen, grösseren Beilagen aus andern pflanzengeographischen Schriften und einem Excurse über die bei pflanzengeographischen Floren-Vergleichungen nöthigen Rücksichten - Humboldt, Alexander von, 1769 -1859 (bei Wilhelm Gottlieb Korn, 1831)

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Pflanzenphysiologie als Theorie der Gärtnerei. Für Botaniker, Gärtner, Landwirte, Forstleute und Pflanzenfreunde - Molisch, Hans, 1856 -1937 (G. Fischer, 1922)

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Physiographie der Medicinal-Pflanzen : nebst einem Clavis zur Bestimmung der Pflanzen mit besonderer Berücksichtigung der Nervation der Blätter - Ettingshausen, Constantin, Freiherr von, 1826 -1897 (W. Braumüller, 1862)

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Physiological plant anatomy - Haberlandt, Gottlieb, 1854 -1945 (Macmillan and Co, 1914)

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Physiologische Pflanzenanatomie - Haberlandt, Gottlieb, 1854 -1945 (W. Engelmann, 1904)

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Physiotypia plantarum austriacarum. Der naturselbstdruck in seiner anwendung auf die gefässpflanzen des österreichischen kaiserstaates, mit besonderer berücksichtigung der nervation in der flächenorganen der pflanzen - Ettingshausen, Constantin, Freiherr von, 1826 -1897 (1856)

Physiotypia plantarum Austriacarum : die Gefässpflanzen Österrichs in Naturselbstdruck mit besonderer Berücksichtigung der Nervation in den Flächenorganen der Pflanzen - Ettingshausen, Constantin, Freiherr von, 1826 -1897 (F. Tempsky in Prag, 1873)

Phytochemie - Rochleder, Friedrich, 1819 -1874 (W. Engelmann, 1854)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1980)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1982)

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The Phytologist: a botanical journal - Irvine, Alexander, 1793 -1873 (William Pamplin, 1855)

The Phytologist: a botanical journal - Irvine, Alexander, 1793 -1873 (William Pamplin, 1857)

The Phytologist: a botanical journal - Irvine, Alexander, 1793 -1873 (William Pamplin, 1858)

The Phytologist: a botanical journal - Irvine, Alexander, 1793 -1873 (William Pamplin, 1861)

The Phytologist: a botanical journal - Irvine, Alexander, 1793 -1873 (William Pamplin, 1862)

The Phytologist: a popular botanical miscellany - Newman, Edward, 1801 -1876 (John van Voorst, 1841)

The Phytologist: a popular botanical miscellany - Newman, Edward, 1801 -1876 (John van Voorst, 1847)

The Phytologist: a popular botanical miscellany - Newman, Edward, 1801 -1876 (John van Voorst, 1850)

Phytoneuron (Guy L. Nesom, 2010)

Phytoneuron (Guy L. Nesom, 2012)

Phytoneuron (Guy L. Nesom, 2013)

Phytoneuron (Guy L. Nesom, 2015)

Phytoneuron (Guy L. Nesom, 2020)

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Die Pilze Schlesiens - Schroeter, J. (J.U. Kern's Verlag, 1889)

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