Das, P C
Manures and fertilizers - Ludhiana, Kalyani Publishers 1993 - 130
81-7096-652-3
Plant nutrients/fertilisers
631.8 DAS
Manures and fertilizers - Ludhiana, Kalyani Publishers 1993 - 130
81-7096-652-3
Plant nutrients/fertilisers
631.8 DAS