TY - BOOK TI - A monograph of the fresh-water univalve mollusca of the United States UR - https://www.biodiversitylibrary.org/item/42949 PB - Conchological Section of the Academy of Natural Sciences CY - Philadelphia PY - 1870 N1 - "In continuation of Prof. S. S. Haldeman's work, published under the same title." AU - Tryon, George W., (George Washington), AU - Haldeman, Samuel Stehman, KW - Gastropoda KW - Mollusks KW - United States ER -