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Use and conservation of the biosphere : proceedings / - Paris : Unesco, 1970. - 272 p. 24 cm. - Natural resources research, 10 SC.69/XII.16/A. . - Unesco. [Document] SC.69/XII.16/A . - Natural resources research ; 10. .

Includes bibliographies.

75024233

F***


Conservation of natural resources--Congresses.

S912 / .I57 1968

572 / UNE
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