American journal of conchology. Tryon, George W. (George Washington), 1838-1888 Academy of Natural Sciences of Philadelphia. Conchological Section. text Philadelphia, G.W. Tryon, jr., 1865-72. eng 7 v. 23 cm. Vols. 3-7 published by the Conchological section of the Academy of Natural Sciences of Philadelphia. extracted picklist 20081216 Mollusks -- Periodicals. Available also via the World Wide Web; access available via SIL PURL. http://www.sil.si.edu/eresources/silpurl.cfm?purl=5437585