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A monograph on foliar anatomy of the genera Connellia, Cottendorfia, and Navia (Bromeliaceae)
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Government Document Online Book -
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A monographic study of the Mexican species of Enlinia (Diptera: Dolichopodidae)
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Government Document Online Book -
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A revision of the tribal and subtribal limits of the Heliantheae (Asteraceae) /
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Government Document Online Book -
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A study of the genus Schistocarpha (Heliantheae : Asteraceae) /
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Government Document Online Book -
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A taxonomic revision of the moss families Hookeriaceae and Hypopterygiaceae in Malaya /
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Government Document Online Book -
12
Generic and subtribal classification of American Vernonieae /
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Government Document Online Book