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6by Horsfield, Brian“...Energy in agriculture (Purdue University. Agricultural Experiment Station)...”
Published 1977
Microform Book -
7by Foster, George H. (George Howard), 1917-“...Energy and agriculture ;...”
Published 1976
Microform Book -
8Published 1980“...Energy and agriculture ;...”
Microform Book -
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12by Foster, George H. (George Howard), 1917-“...Energy and agriculture ;...”
Published 1976
Microform Book -
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