@ARTICLE {ISLAM:1980, title = {Response of cowpea (Vigna unguiculata) to inoculation with VA-mycorrhizal fungi and to rock phosphate fertilization in some unsterilized Nigerian soils}, author = {Islam, R. and Ayanaba, A. and Sanders, F. E. }, journal = {Plant and Soil}, year = {1980}, volume = {54}, pages = {107--117}, }