Pisharadi, T N P
മണ്ണും സസ്യപോഷണവും = Mannum sasyaposhanavum (soil and plant nutrition)/ - Trivandrum State Institute of Languages 1979 - 315
Malayalam
മണ്ണും സസ്യപോഷണവും = Mannum sasyaposhanavum (soil and plant nutrition)/ - Trivandrum State Institute of Languages 1979 - 315
Malayalam