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You searched for: Creator Personal Names Porterfield, I. D. (Ira Deward), 1920- Remove constraint Creator Personal Names: Porterfield, I. D. (Ira Deward), 1920- All Creators McLaren, G. A. Remove constraint All Creators: McLaren, G. A. Subject Topical Dairy cattle--Physiology. Remove constraint Subject Topical: Dairy cattle--Physiology.

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