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Conception Rate in Dairy Cattle by Artificial Insemination at Various Stages of Estrus
Arnold E. Baragar
George W. Trimberger
I. L. Hathaway
Jesse Elmer Livingston
Thomas Mark McCalla
Leunis Van Es
出版
University of Nebraska, College of Agriculture, Agricultural Experiment Station
, 1942
URL
http://books.google.com.hk/books?id=w8VQAQAAMAAJ&hl=&source=gbs_api