A Memoir of Thomas Bellerby Wilson ...prepared in Pursuance of a Resolution of the Entomological Society of Philadelphia

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A Memoir of T. B. Wilson, M.D., prepared in pursuance of a resolution of the Entomological Society of Philadelphia, by a Committee

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Nineteenth Century Short-title Catalogue: phase 1. 1816-1870

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Proceedings of the Academy of Natural Sciences of Philadelphia

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Bibliography of American Imprints to 1901: Main part

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Nineteenth Century Short-title Catalogue: phase 1. 1816-1870 ( v.)

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A Brief History of Academy Publications

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Proceedings of the Boston Society of Natural History

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Memoir of S. Breck, late president of the Pennsylvania Institution for the Instruction of the blind, ... read before the board of managers, etc

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Pamphlets in American History

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