1. The fate of petroleum in soil ecosystems;Bossert,1984
2. Inorganic forms of nitrogen;Bremner,1965
3. Effect of Dyrene and Maneb on nitrification and ammonification and their biodegradation in tropical soils;Dubey,1970
4. The effects of zinc and copper on soil nitrification;Lees;Biochem. J.,1948
5. Emulsification and demulsification in oil recovery;Lissant,1977