Egyptian freshwater algae /
El-Nayal, A. A.
Egyptian freshwater algae / by A. A. El-Nayal - Cairo : [s.n.], 1935 - 106 p. : ill. ; 25 cm - Bulletin of the Faculty of Science .
Tav. di studio SZN
Egyptian freshwater algae / by A. A. El-Nayal - Cairo : [s.n.], 1935 - 106 p. : ill. ; 25 cm - Bulletin of the Faculty of Science .
Tav. di studio SZN