Spedding, C. R. W. creator Walsingham, J. M. Hoxey, A. M. text bibliography enk New York Academic Press c1981 1981 monographic eng

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x, 383 p. : ill. ; 23 cm. C.R.W. Spedding, J.M. Walsingham, and A.M. Hoxey. Includes bibliographies and index. Agricultural productivity Biological productivity Agriculture Biology, Economic S494.5.P75 S63 631.5 SPB 0126565600 80042231 DLC 820419 20150108181341.0 2300047