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Creator Personal Names
Porterfield, I. D. (Ira Deward), 1920-
Remove constraint Creator Personal Names: Porterfield, I. D. (Ira Deward), 1920-
All Creators
Olson, N. O.
Remove constraint All Creators: Olson, N. O.
All Subjects
Dairy cattle--Parturition.
Remove constraint All Subjects: Dairy cattle--Parturition.
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