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A monograph of the phyllopod crustacea of North America, with remarks on the order of phyllocarida - Packard, A. S. (Alpheus Spring), 1839 -1905 (s.n, 1877)

A monograph on the development of elasmobranch fishes - Balfour, Francis M. (Francis Maitland), 1851 -1882 (1878)

A monograph on the Polychaeta of Southern Africa - Day, J. H. (British Museum (Natural History), 1967)

A monograph on the Polychaeta of southern Africa - Day, J. H. (BM(NH), 1967)

Monographie der capitelliden des golfes von Neapel und der angrenzenden meeres-abschnitte, nebst untersuchungen zur vergleichenden anatomie und physiologie - Eisig, Hugo 1847 -1920 (Friedländer, 1887)

Monographie der Nematoden - Schneider, Anton, 1831 -1890 (G. Reimer, 1866)

Montana amphibian and reptile status assessment, literature review, and conservation plan - United States. Bureau of Land Management. (Montana Natural Heritage Program, 2009)

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More letters of Charles Darwin : a record of his work in a series of hitherto unpublished letters - Darwin, Charles, 1809 -1882 (J. Murray, 1903)

More letters of Charles Darwin. A record of his work in a series of hitherto unpublished letters - Darwin, Charles, 1809 -1882 (J. Murray, 1903)

Morphogenetische Studien : als Betrag zur Methodologie zoologischer Forschung - Garbowski, Tadeusz, 1869 -1940 (G. Fischer, 1903)

Morphologie und Biologie der Zelle - Gurvich, Aleksandr Gavrilovich, 1874 - (G. Fischer, 1904)

Morphologisches Jahrbuch (Wilhelm Engelmann, 1876)