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How costs of production vary
Ahearn, Mary Clare (contributor) - 1990
Persistent link: https://www.econbiz.de/10000883100
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Regional trends in extension system resources
Ahearn, Mary Clare (contributor); Yee, Jet (contributor);  … - 2003 - [Elektronische Ressource]
Persistent link: https://www.econbiz.de/10002131171
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Agricultural productivity in the United States : an Economic Research Service report
Ahearn, Mary Clare; Yee, Jet; Ball, Eldon; Nehring, … - 1998
Persistent link: https://www.econbiz.de/10001436417