共 42 条
[2]
[Anonymous], 1962, SOIL CHEM ANAL
[4]
Buckman H.O., 1969, NATURE PROPERTIES SO
[5]
CHANDRARATNE MF, 1957, 1956 DIR AGR ADM REP
[6]
Desikachary T. V., 1959, CYANOPHYTA DESIKACHA
[7]
DURAIRATNAM M, 1969, B FISH RES STN CEYLO, V20, P151
[8]
Fogg, 1965, ALGAL CULTURE PHYTOP
[9]
Fogg G. E., 1973, BLUE GREEN ALGAE