The ecology of resource degradation and renewal : the 15th Symposium of the British Ecological Society, 10-12 July 1973 / edited by M.J. Chadwick and G.T. Goodman.

Subjects: “…Conservation of natural resources Congresses…”

Resource development in semi-arid lands : a Royal Society discussion (held 17, 18 March 1976) organized by Sir Joseph Hutchinson ... (et al.).

Subjects:

Biodiversity in managed landscapes : theory and practice / edited by Robert C. Szaro, David W. Johnston.

Subjects: “…Conservation of natural resources Congresses…”