air, water, and soil Marquis, Ralph William comp creator comp. Graduate School, USDA text dcu Washington] Graduate School, U.S. Dept. of Agriculture [1966] 1966 monographic eng

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vii, 105 p. ports. 23 cm. edited by Ralph W. Marquis. Text of the lectures presented at the lecture series, Environmental improvement, U.S. Dept. of Agriculture, May 1966. Pollution TD180 .M3 628 agr67000144 U.S. Nat'l Agr. Libr. 711119 20260227111026.0 agr67000144