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Joshi, P K and Asokan, M and Datta, K K and Kumar, P (2000) Socioeconomic constraints to legumes production in rice-wheat cropping systems of India. In: Legumes in rice and wheat cropping systems of the Indo-Gangetic Plain - constraints and opportunities. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India, pp. 176-184. ISBN 92-9066-418-5