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Ahmed, S and Rao, M R (1982) Performance of maize—soybean intercrop combination in the tropics: Results of a multi-location study. Field Crops Research, 5. pp. 147-161. ISSN 0378-4290
Ravinder Reddy, Ch and Nigam, S N and Rao, P P and Ahmed, S and Ratnakar, R and Alur, A S and Ashok Kumar, A and Reddy, B V S and Gowda, C L L (2010) Village Seed Banks:An integrated seed system for improved seed production and supply – A case study. Monograph. International Crops Research Institute for the Semi-Arid Tropics.