@INBOOK {RANGA:1981, title = {Exploiting symbiotic nitrogen fixation for increasing soybean yields in Africa}, author = {Rao, V and Ayanaba, A. and Eaglesham, A. R. J. and Kueneman, E. }, editor = {Emejuaiwe, S. O. and Ogunbi, O. and Sanni, S. O. }, year = {1981}, type = {GIAM VI. Global impacts of Applied Microbiology}, pages = {153--167}, publisher = {Academic Press}, address = {London}, }