The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2009)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2013)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2014)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2015)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2016)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2017)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2018)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2019)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2020)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 2021)

Kenwood Iris Gardens hemerocallis list : season 1948 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Kenwood Iris Gardens, 1948)

Kenwood Iris Gardens hemerocallis list : season 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Kenwood Iris Gardens, 1950)

Kenya birds - National Museums of Kenya. Department of Ornithology. (Dept. of Ornithology, National Museums of Kenya and the Kenya Section of the International Council for Bird Preservation, 1997)

Key to the secret of breeding for sex with horse, jack, and bull - Slaughter, R. M. (Sherman printing co, 1898)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 1989)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 1999)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2002)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2003)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2004)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2005)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2006)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2007)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2008)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2009)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2010)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2011)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2012)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2013)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2014)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2015)

The Kingbird - Federation of New York State Bird Clubs. (s.n, 2016)

Kiralyi Magyar Természettudományi Társulat evkonyvei - Magyar Természettudományi Társulat. (1841)

Kirtlandia - Cleveland Museum of Natural History (Cleveland Museum of Natural History, 2006)

Klaus, der Bienenvater aus Böhmen - Oettl, Johann Nepomuk, 1801 -1866 (F. Ehrlich, 1862)

Kleine botanische Schriften. I. Theil - Griesselich, Ludwig, 1804 -1848 (J. Velten, 1836)

Kleine Fauna und Flora von der südwestlichen Gegend um Wien bis auf den Gipfel des Schneeberges ([s.n, 1807)

Köhler's Medizinal-Pflanzen in naturgetreuen Abbildungen mit kurz erläuterndem Texte : Atlas zur Pharmacopoea germanica, austriaca, belgica, danica, helvetica, hungarica, rossica, suecica, Neerlandica, British pharmacopoeia, zum Codex medicamentarius, sowie zur Pharmacopoeia of the United States of America - Gürke, M. (Max) 1854 -1911 (Fr. Eugen Köhler, 1887)

Kolocsa vidékének növénytenyészete - Menyharth, Lászlo, 1849 -1897 (Hunyadi Mátyás, 1877)

Kräuterbuch : unsere Heilpflanzen in Wort und Bild - Losch, Friedrich. (J.F. Schreiber, 1905)

Die Krankheiten der Pflanzen; ein Handbuch für Land- und Forstwirte, Gärtner, Gartenfreunde und Botaniker - Frank, Albert Bernhard, 1839 -1900 (E. Trewendt, 1895)

Die krankheiten der pflanzen, ein handbuch fur land-und forstwirte, gartner, gartenfreunde und botaniker - Frank, Albert Bernhard, 1839 -1900 (Trewendt, 1896)

Kritische Flora der Provinz Schlezwig-Holstein, des angrenzenden Gebiets der Hansestädte Hamburg und Lübeck und des Fürstenthums Lübeck - Fischer-Benzon, R. von (Rudolph), 1839 -1911 (Paul Toeche, 1888)

Kritisk ordbok öfver svenska växtnamnen - Fries, Elias, 1794 -1878 (P.A. Norstedt, 1880)