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Popular botany; the living plant from seed to fruit - Step, Edward, 1855 -1931 (H. Holt and company, 1913)

The Popular educator: a complete encyclopaedia of elementary, advanced and technical education (Cassell, 1888)

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A popular history of the British ferns, and the allied plants, comprising the club-mosses, pepperworts, and horsetails - Moore, Thomas, 1821 -1887 (Routledge, Warne & Routladge, 1862)

A popular history of the British ferns and the allied plants, : comprising the club-mosses, pepperworts, and horsetails - Moore, Thomas, 1821 -1887 (Routledge, Warne, & Routledge, 1859)

A popular history of the British ferns and the allied plants : comprising the club-mosses, pepperworts and horsetails - Moore, Thomas, 1821 -1887 (Lovell Reeve, 1855)

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The principles of plant-teratology - Worsdell, Wilson Crosfield (The Ray Society, 1915)

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Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1904)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1909)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1912)

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Report on the fossil plants of Illinois - Lesquereux, Léo, 1806 -1889 (Geological Survey of Illinois, 1870)

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Reproduction des cryptogames - Rietsch, Maximilien. (G. Baillière, 1882)

Resultate der Wissenschaftlichen Erforschung des Balatonsees - Hungary. Földmm̋uvelésügyi Minisztérium. (E. Hölzel, 1897)

Revised checklist of New York State plants - Mitchell, Richard S., 1938 - (University of the State of New York, State Education Dept, 1997)

Revista chilena de historia natural - Museo de Historia Natural de Valparaíso (Valparaíso, Chile) (Litografia e Impr. Industrial (F. Peters), 1910)