Dixon, J.A. Sherman, P.B.
Economics of protected areas: a new look at benefits and costs - Washington, D.C. (EUA) Island Press 1990 - 234 p.
Bib. p. 213-221; Ilus.
Economics of protected areas: a new look at benefits and costs - Washington, D.C. (EUA) Island Press 1990 - 234 p.
Bib. p. 213-221; Ilus.