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Singh, S K and Dubey, S K and Ali, M and Nigam, S N and Srivastava, R K and Saxena, K B and Yadav, A S and Kumar, A (2013) Development and Promotion of Informal and Formal Seed System Through Farmer Participatory Seed Production of Pigeonpea (Cajanuscajan L.) in Uttar Pradesh, India. Agroecology and Sustainable Food Systems, 37 (5). pp. 531-549. ISSN 2168-3573