A handbook of dairy statistics - Pirtle, Thomas Ross, 1870-; Pirtle, T. R. (Thomas Ross), 1870- (Washington, U.S. Govt. print. off., 1933)
At head of title: United States. Department of agriculture.
"This ... supplements the handbook published in 1928, which was a revision of an earlier publication of the Bureau of animal industry. (A.1.37, by T. R. Pirtle: 1922)"--Foreword, p. iii.
Keywords: Dairying -- Statistics