Field and laboratory studies of fertilizer runoff and its effect on eutrophication of natural waters /

by Zulkifli Haji Shamsuddin, 1947-.
Published 1973

A socio-economic survey in Dusun Tua /

by Zulkifli Haji Shamsuddin, 1947-.
Published 1970

Biotechnology of nitrogen fixation in the tropics (BIOnifT) : proceedings of a UNESCO Regional Symposium and Workshop on "Biotechnology of Nitrogen Fixation in the Tropics" (BIOnif...

Published 1988