Mathematical bioeconomics the mathematics of conservation מאת Clark, Colin Whitcomb 1931-

Ecological applications a publication of the Ecological Society of America.

Economics and biological diversity developing and using economic incentives to conserve biological resources מאת McNeely, Jeffrey A.

The economics of biological diversity apologetics or theory? מאת Norgaard, Richard B.

Mathematical bioeconomics the optimal management of renewable resources מאת Clark, Colin Whitcomb 1931-

The biology of agricultural systems מאת Spedding, C. R. W.

The biology of agricultural systems מאת Spedding, C.R. W.

Biology and the manufacturing industries proceedings of a symposium held at the Royal Geographical Society, London, on 29 and 30 September 1966

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Man in nature מאת Bates, Marston

Man in nature מאת Bates, Marston, 1906-1974