USGS · 38042
Crow damage to fall grain crops in Oklahoma in 1937: with a comparison of field and questionnaire methods of appraisal
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Ralph H. Imler, E.R. Kalmbach. 1939. Crow damage to fall grain crops in Oklahoma in 1937: with a comparison of field and questionnaire methods of appraisal. https://pubs.usgs.gov/publication/38042
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