Materials in the economy: materials flows, scarcity, and the environment /

Wagner, Lorie A.

Materials in the economy: materials flows, scarcity, and the environment / Lorie A. Wagner - Washington : U.S. G.P.O., 2001 - iv, 29 p. : ill. (some colour0 maps ; 2001 - U.S. Geological Survey Circular; no.1221 .

Refrences: p.28-29

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