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1
Environmental science : a study of interrelationships / Eldon D Enger; Bradley Fraser Smith
Boston, Mass : McGraw-Hill, 2000.
xxi, 434 p. : col. ill., col. maps ; 28 cm. +1 computer laser optical disc (4 3/4 in.)
2
Environmental science : a study of interrelationships.
Boston, Mass. : WCB/McGraw Hill, c1998.
xxi, 456 p. : ill. (some col.), col. maps ; 29 cm.