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Creator Personal Names
Welch, J. A. (James A.)
Remove constraint Creator Personal Names: Welch, J. A. (James A.)
All Creators
Smith, G. B.
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Subject Topical
Ruminants--Feeding and feeds.
Remove constraint Subject Topical: Ruminants--Feeding and feeds.
Subject Topical
Urea.
Remove constraint Subject Topical: Urea.
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