00387nam a2200097Ia 4500008004100000100002000041245006800061260013400129700001300263700001300276220216s9999    xx            000 0 und d  aKothandaraman R 0aStrategies of biological nitrogen fixation in rubber plantation  bNational Seminar on Biological Nitrogen fixation - Prospects and strategies held at University of Madras on 12th March 1993c1993  aJoseph K  aMathew J