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1

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Farming systems of the world, by A.N. Duckham and G.B. Masefield; assisted by R.W. Willey and Kathleen Down..

by Duckham, A. N
Published 1970

2

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Intensified systems of farming in the tropics and subtropics J.A. Nicholas Wallis..

by Wallis, J. A. N.
Published 1997

3

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Farming systems research and development : guidelines for developing countries W.W. Shaner, P.F. Philipp, W.R. Schmehl/;editorial assistance, Donald E. Zimmerman.

by Shaner, W. W.
Published 1982

4

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Proceedings of a Seminar [on] Agricultural Research and Develpment : the need to be user sensitive edited by Dominic Lim.

Published 1994