Some notes on the trichoptera of standing waters in Africa, mainly south of the Zambezi K. M. F. Scott OriginalPaper Pages: 177 - 195
A preliminary study on biological control of the snail intermediate hosts of schistosomiasis in U.A.R. by Helisoma duryi snails N. AyadA. H. MousaS. Zaghloul OriginalPaper Pages: 196 - 202
Effect of pretreating the seeds with extracts of Phormidium foveolarum on growth and development of maize seedlings A. S. KushwahaA. B. Gupta OriginalPaper Pages: 203 - 208
A preliminary study on the plankton of the Ponggol estuary Chua Thia Eng OriginalPaper Pages: 254 - 272
Primary productivity of the North Branch of the Raritan River, New Jersey David A. Flemer OriginalPaper Pages: 273 - 296
Diurnal variations in a shallow tropical freshwater fish pond in Shahjahanpur, U.P. (India) Asif A. KhanA. Qayyum SiddiquiM. Nazir OriginalPaper Pages: 297 - 304
The temperature of three different small streams in northwest England D. T. CrispE. D. Le Cren OriginalPaper Pages: 305 - 323
Effect of algal growth promoting substances of Phormidium foveolarum on seedlings of some varieties of wheat A. S. KushwahaA. B. Gupta OriginalPaper Pages: 324 - 332
Physiological studies on Biomphalaria alexandrina and Bulinus truncatus, the snail vectors of Schistosommiasis M. M. IshakA. M. MohamedN. Ayad OriginalPaper Pages: 333 - 344