00866cam a22002531 4500 agr67000144 DLC 20260227111026.0 711119s1966 dcuc 000 0 eng c agr67000144 (OCoLC)173252 U.S. Nat'l Agr. Libr. OAU OCoLC DLC premarc TD180 .M3 aTD180.A2M3 628 Marquis, Ralph William, comp., comp. Environmental improvement; air, water, and soil, edited by Ralph W. Marquis. [Washington] Graduate School, U.S. Dept. of Agriculture [1966] vii, 105 p. ports. 23 cm. Text of the lectures presented at the lecture series, Environmental improvement, U.S. Dept. of Agriculture, May 1966. Pollution. Graduate School, USDA. 12195 12195