TY - BOOK AU - P Krishnappa Shetty AU - T K Ramachandra Reddy Department of Agricultural Microbiology TI - Variabiity in cultivars of cowpea (Vigna unguicul;ata (L.) walp) For nodulation and nitrogen fixation U1 - 633.33 PY - 1987/// CY - Dharwad PB - University of Agricultural Sciences, Dharwad ER -