Spedding, C. R. W.
Biological efficiency in agriculture C.R.W. Spedding, J.M. Walsingham, and A.M. Hoxey - London New York Academic Press 1981 - x, 383 p. ill. 23 cm
Agricultural productivity
Biological productivity
Agriculture
Biology, Economic
630
Biological efficiency in agriculture C.R.W. Spedding, J.M. Walsingham, and A.M. Hoxey - London New York Academic Press 1981 - x, 383 p. ill. 23 cm
Agricultural productivity
Biological productivity
Agriculture
Biology, Economic
630