Ecosociety a historical study of ecological man by Hart, Robert A. de J.

Forest farming : towards a solution to problems of world hunger and conservation by Douglas, J. Sholto

Other Authors: “…Hart, Robert A. de J.…”

Forest farming : prosperity for India by Douglas, J. Sholto

Other Authors: “…Hart, Robert A de. J.…”

Forest farming : prosperity for India by Douglas, J. Sholto

Other Authors: “…Hart, Robert A de. J.; G. Shankar, Ranghanathan…”