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Judging the Dairy Cow as a Subject of Instruction in Secondary Schools
Altus Lacy Quaintance
Benjamin Robert Leach
Gershom Franklin White
Harry Percy Barrows
Jenkin William Jones
John Enos Graf
Louis Theodore Larsen
Philip Luginbill
Ralph Hoagland
Russell Arthur Oakley
Earl Walker Geyer
Herbert Perry Davis
Samuel Garver
Theodore Dietrich Urbahns
Trueman Doane Woodbury
Wilmer Chrisman Powick
Charles Neil McBryde
出版
U.S. Department of Agriculture
, 1916
URL
http://books.google.com.hk/books?id=Jg9TAQAACAAJ&hl=&source=gbs_api