Van Norman, H. E. (1919). First lessons in dairying: A handbook setting forth the underlying principles of dairying for the student beginner in the laboratory and on the farm. Orange Judd Company.
Dyfyniad Arddull ChicagoVan Norman, H. E. First Lessons in Dairying: A Handbook Setting Forth the Underlying Principles of Dairying for the Student Beginner in the Laboratory and on the Farm. New York: Orange Judd Company, 1919.
Dyfyniad MLAVan Norman, H. E. First Lessons in Dairying: A Handbook Setting Forth the Underlying Principles of Dairying for the Student Beginner in the Laboratory and on the Farm. Orange Judd Company, 1919.
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