A Nature conservation review the selection of biological sites of national importance to nature conservation in Britain

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The natural areas project a summary of data to date অনুযায়ী Herrick, James Arthur

A Guide to the literature of Ohio's natural areas অনুযায়ী Elfner, Lynn Edward

Conservation in the Soviet Union অনুযায়ী Pryde, Philip R.

Thai heritage, world heritage.

Management manual for UNESCO biosphere reserves in Africa a practical guide for managers অনুযায়ী Amer, Wafaa, Ashong, Sheila, Tiomoko, Djafarou

Dixon, John A. and Sherman, Paul B.,"economics of protected areas a new look at benefits and costs"(book review) অনুযায়ী Willis, K.G