@book{bhlpg18212909, title = {Contributions to a science of nematology }, url = {https://www.biodiversitylibrary.org/page/18212909}, publisher = {Williams & Wilkins Co}, author = {Cobb, Nathan Augustus, 1859 -1932}, year = {1914}, pages = {Page 478}, } @book{bhlpg18212910, title = {Contributions to a science of nematology }, url = {https://www.biodiversitylibrary.org/page/18212910}, publisher = {Williams & Wilkins Co}, author = {Cobb, Nathan Augustus, 1859 -1932}, year = {1914}, pages = {Page 479}, }