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[15] U. S. Dept. Agr., Farmers' Bul. 602, Dairy Division, Production of clean milk, 1914.
Lauder, A., and A. Cunningham, Some factors affecting the bacteriological content of milk, Edinburgh and East of Scotland Coll. of Agr. Rept. XXVIII, 1913.
Prucha, M. J., and H. M. Weeter, Germ content of milk, Ill. Exp. Sta. Bul. 199, 1917.
Harding, H. A., et al., The effect of certain dairy operations upon the germ content of milk, N. Y. Exp. Sta. Bul. 365, 1913.
Fraser, W. J., Sources of bacteria in milk, Ill. Exp. Sta. Bul. 91, 1903.
Frandsen, J. H., Care of milk and cream on the farm, Neb. Exp. Sta. Bul. 133, 1912.
Conn, H. W., The care and handling of milk, Conn. (Storrs) Exp. Sta. Bul. 26, 1903.
Stocking, W. A., Jr., Quality of milk as affected by certain dairy operations, Conn. (Storrs) Exp. Sta. Bul. 42, 1906.
[16] Harding, H. A., J. K. Wilson and G. A. Smith, Tests of covered milk pails, N. Y. Exp. Sta. Bul. 326, 1910.