Synopsis of the Naiades : or pearly fresh-water mussels / by Charles Torrey Simpson - Simpson, Charles Torrey, 1846 -1932 (Govt. Print. Off, 1900)

A synoptical compend of British botany ... arranged after the Linnean system - Galpine, John Kingston, 1806 (S. Bagster, 1834)

A systematic arrangement of British plants - Withering, William, 1741 -1799 (Printed for Adam Scott, 1848)

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Systematisches Conchylien-Cabinet - Kobelt, Wilhelm, 1840 -1916 (Bauer und Raspe, 1920)

Taxonomic revisions in the family Haloragaceae. 1, The genera Haloragis, Haloragodendron, Glischrocaryon, Meziella and Gonocarpus - Orchard, A E (Auckland Institute and Museum, 1975)

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A tentative classification of the palearctic unionids - Haas, Fritz, 1886 -1969 (1940)

The terrestrial air-breathing mollusks of the United States, and the adjacent territories of North America - Gould, Augustus A. (Augustus Addison), 1805 -1866 (C. C. Little and J. Brown, 1851)

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