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Managing animal wastes : Guidelines for decision-making. L[ee] A. Christensen [u.a.] United States Dep. of Agriculture, Economic Research Service
Christensen, Lee A. (contributor) - 1981
Persistent link: https://www.econbiz.de/10002300444
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The economic performance of proportional-profit sugar farms in Puerto Rico, 1950-62
Stahl, John E. - 1971
Persistent link: https://www.econbiz.de/10003094390