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       Eckles , Clarence Henry, 1875-1933  Milk and milk products ; prepared for the use of agricultura college students , by Clarence Henry Eckles ... Willes Barnes Combs ... Harold Macy . 2d . ed . New York , McGraw - Hill , 1936 . xiii , 386 p . ilus . , diagrs . 24 cm . ( McGraw-Hill publications in the agricultural and botanical sciences )