@book{bhlpg11035073, title = {Manual of conchology, structural and systematic : with illustrations of the species }, volume = {Ser.1, v.6}, url = {https://www.biodiversitylibrary.org/page/11035073}, publisher = {Published by the Author, Academy of Natural Sciences}, author = {Tryon, George W., (George Washington), 1838 -1888}, year = {1884}, pages = {Page 141}, } @book{bhlpg24092702, title = {Manual of conchology, structural and systematic : with illustrations of the species }, volume = {Ser.1, v.6}, url = {https://www.biodiversitylibrary.org/page/24092702}, publisher = {Published by the Author, Academy of Natural Sciences}, author = {Tryon, George W., (George Washington), 1838 -1888}, year = {1879}, pages = {Page 141}, } @book{bhlpg19134538, title = {Manual of conchology, structural and systematic : with illustrations of the species }, volume = {Ser.1, v.6}, url = {https://www.biodiversitylibrary.org/page/19134538}, publisher = {Published by the Author, Academy of Natural Sciences}, author = {Tryon, George W., (George Washington), 1838 -1888}, year = {1879}, pages = {Page 141}, }