1. Ahmad, M. H., and G. S. Venkataraman: Tolerance ofAulosirafelfilissimato pesticides. Current Sci.42, 108 (1973).
2. Alexander, M.: Introduction to soil microbiology. New York: Wiley (1961).
3. Almazan, L. L., and D. O. Robles: Exploratory study of the effect of algae upon lowland rice. Araneta J. Agr.3, 1(1956).
4. Andrews, J. H.: The pathology of marine algae. Biol. Rev.51. 2ll (l976)
5. Anonymous: Weed control in transplanted rice. Annual report. Internat. Rice Res. Inst.. p. 181 (1970).