@book{bhlpg5850484, title = {Biology of the seas of the U.S.S.R }, url = {https://www.biodiversitylibrary.org/page/5850484}, publisher = {Interscience Publishers}, author = {Zenkevich, L. A. (Lev Aleksandrovich), 1889 -1970}, year = {1963}, pages = {Page 908}, } @book{bhlpg5849892, title = {Biology of the seas of the U.S.S.R }, url = {https://www.biodiversitylibrary.org/page/5849892}, publisher = {Interscience Publishers}, author = {Zenkevich, L. A. (Lev Aleksandrovich), 1889 -1970}, year = {1963}, pages = {Page 259}, }