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Orr, Alastair, Singh, S.P., Singh, B.N. and Sinha, R.K.P. (2008) Prospects for direct-seeded rice in eastern India: socioeconomic perspectives. In: Singh, Y., Singh, V.P., Chauhan, B., Orr, Alastair, Mortimer, A.M., Johnson, D.E. and Hardy, B., (eds.) Direct seeding of rice and weed managment in the irrigated rice-wheat cropping system of the Indo-Gangetic plains. International Rice Research Institute, Los Banos, Laguna, pp. 251-266. ISBN 978-971-22-0236-0

Singh, S.P., Orr, A., Singh, Shailendra and Singh, G. (2008) The economics of direct-seeded rice in eastern India. In: Singh, Y., Singh, V. P., Chauhan, B., Orr, A., Mortimer, A. M., Johnson, D. E. and Hardy, B., (eds.) Direct seeding of rice and weed management in the irrigated rice-wheat cropping system of the Indo-Gangetic Plains. International Rice Research Institute, Los Banos, Laguna, pp. 229-250. ISBN 9789712202360