USACHEV, P.I. 1927 O fitoplanktone Azovskogo morya [The phytoplankton of the Sea of Azov] In: [Festschrift for the professor Nikolai Mikhailovich Knipovich]. (People's Commissariat of Agriculture of the RSFSR Eds.) Moscow: Narodniy Komissariat Zemledeliya RSFSR Pp. 405-429, 2 figs. |