1. Introduction to Soil Microbiology;Alexander,1961
2. Organic carbon;Alliston,1965
3. Standard Methods for the Examination of Water and Waste Water;APHA,1976
4. The role of tubificid worms on nitrogn transformations in stream sediments;Chatarpaul;Can. J. Fish. Aquat. Sci.,1979
5. Effects of tubificid worms on denitrification in stream sediments;Chatarpaul;Can. J. Fish. Aquat. Sci.,1980