I. Jonstons Naeukeurige beschryving van de natuur der vier-voetige dieren, vissen en bloedlooze water-dieren, vogelen, kronkel-dieren, slangen en draken - Jonstonus, Joannes, 1603 -1675 (Bij I.I. Schipper, 1660)

Iac. Cornuti doctoris medici Parisiensis Canadensium plantarum, aliarúmque nondum editarum historia. : Cui adiectum est ad calcem enchiridion botanicum Parisiense, continens indicem plantarum, quæ in pagis, siluis, pratis, & montosis iuxta Parisios locis nascuntur - Cornut, Jacques Philippe, 1606 -1651 (venundantur apud Simonem Le Moyne, viâ Iacobeâ, 1635)

Iacobi Grevini Claromontani Bellovaci Parisiensis medici ... De venenis libri duo. : Gallice primum ab eo scripti, et à multis hactenus Latini desiderati - Ballain, Godefroy, active 1564 -1567 (Ex officina Christophori Plantini, 1571)

Icones florae Germanicae et Helveticae, simul Pedemontanae, Tirolensis, Istriacae, Dalmaticae, Austriacae, Hungaricae, Transylvanicae, Moravicae, Borussicae, Holsaticae, Belgicae, Hollandicae, ergo Mediae Europae. Iconographia et supplementum ad opera Willdenowii [et al.] ... - Reichenbach, H. G. (Heinrich Gustav) 1824 -1889 (F. Hofmeister [etc.], 1903)

Icones stirpium, seu, Plantarum tam exoticarum, quam indigenarum :in gratiam rei herbariae studiosorum in duas partes digestae : cum septem linguarum indicibus, ad diuersarum nationum vsum - Moretus, Jan 1543 -1610 (Ex officina plantiniana :Apud Viduam et Ioannem Moretum, 1591)

Iconografia della fauna italica : per le quattro classi degli animali vertebrati - Bonaparte, Charles-Lucien, 1803 -1857 (Tip. Salviucci, 1841)

Iconographia floræ italicæ : ossia, Flora italiana illustrata ... - Crépin, François, 1830 -1903 (Tip. del seminario, 1895)

Iconum botanicarum index locupletissimus = Die Abbildungen sichtbar blühender Pflanzen und Farnkräuter : aus der botanischen und Gartenliteratur des XVIII. und XIX. Jahrhunderts in alphabetischer Folge zusammengestellt - Pritzel, G. A. (Georg August), 1815 -1874 (In Libraria F. Nicolai, 1855)

Iconum botanicarum index locupletissimus. Verzeichniss der Abbildungen sichtbar blühender Pflanzen und Farnkräuter aus der botanischen und Gartenliteratur des XVIII. und XIX. Jahrhunderts in alphabetischer Folge zusammengestellt - Pritzel, G. A. (Georg August), 1815 -1874 (Nicolaische Verlagsbuchh, 1866)

Iheringia Série zoologia - Fundação Zoobotânica do Rio Grande do Sul. Museu de Ciências Naturais. (Museu Rio-Grandense de Ciências Naturais, Divisão de Ciências do Departamento de Ciência e Cultura, Secretaria de Estado dos Negócios da Educação e Cultura do Govêrno do Estado do Rio Grande do Sul, 1960)

Iheringia Série zoologia - Fundação Zoobotânica do Rio Grande do Sul. Museu de Ciências Naturais. (Museu Rio-Grandense de Ciências Naturais, Divisão de Ciências do Departamento de Ciência e Cultura, Secretaria de Estado dos Negócios da Educação e Cultura do Govêrno do Estado do Rio Grande do Sul, 1963)

Iheringia Série zoologia - Fundação Zoobotânica do Rio Grande do Sul. Museu de Ciências Naturais. (Museu Rio-Grandense de Ciências Naturais, Divisão de Ciências do Departamento de Ciência e Cultura, Secretaria de Estado dos Negócios da Educação e Cultura do Govêrno do Estado do Rio Grande do Sul, 1978)

Les îles Canaries. Flore de l'archipel - Proust, Louis, 1878 -1959 (P. Klincksieck, 1908)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1914)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1927)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1968)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1972)

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists - Nicholson, George, 1847 -1908 (L.U. Gill, 1884)

The Illustrated dictionary of gardening : a practical and scientific encyclopaedia of horticulture for gardeners and botanists - Nicholson, George, 1847 -1908 (L. Upcott Gill, 1887)

The illustrated dictionary of gardening, a practical and scientific encyclopedia of horticulture for gardeners and botanists - Nicholson, George, 1847 -1908 (L. U. Gill, 1884)

An illustrated dictionary of medicine, biology and allied sciences ... by George M. Gould. 5th ed., with additions and corrections - Gould, George M. (George Milbry), 1848 -1922 (P. Blakiston's Son, 1907)

An illustrated dictionary of scientific terms - Rossiter, William, 1897 (G. P. Putnam's Sons, 1878)

The illustrated natural history - Wood, J. G. (John George), 1827 -1889 (Harper & Bros, 1872)

The illustrated natural history - Wood, J. G. (John George), 1827 -1889 (G. Routledge, 1853)

Illustrated natural history - Wood, J. G. (John George), 1827 -1889 (Home Bk. Co, 1880)

Illustrazione del primo volume dell'Erbario di Ulisse Aldrovandi - Mattirolo, Oreste, 1856 -1947 (Tip. di A. Ciminago, 1899)

Illustriertes Handbuch der Laubholzkunde :Charakteristik der in Mitteleuropa heimischen und im freien angepflanzten angiospermen Geho¨lz-Arten und Formen mit Ausschluss der Bambuseen und Kakteen - Schneider, Camillo, 1876 -1951 (G. Fischer, 1912)

In Codicem botanicum linnaeanum index alphabeticus : generum, specierum ac synonymorum omnium completissimus - Linné, Carl von, 1707 -1778 (O. Wigand, 1840)

Incrementa florae phaenogamae Rossicae - Trautvetter, Ernst Rudolph von, 1809 -1889 ([s.l.], 1882)

Index animalium; sive, Index nominum quae ab A. D. MDCCLVIII generibus et speeiebus animalium imposita sunt - Sherborn, Charles Davies, 1861 -1942 (e typographio academico, 1892)

Index animalium; sive, Index nominum quae ab A. D. MDCCLVIII generibus et speeiebus animalium imposita sunt - Sherborn, Charles Davies, 1861 -1942 (e typographio academico, 1758)

Index animalium; sive, Index nominum quae ab A. D. MDCCLVIII generibus et speeiebus animalium imposita sunt - Sherborn, Charles Davies, 1861 -1942 (e typographio academico, 1801)

Index animalium; sive, Index nominum quae ab A. D. MDCCLVIII generibus et speeiebus animalium imposita sunt - Sherborn, Charles Davies, 1861 -1942 (e typographio academico, 1902)