[68] Conn, 3 Rept. Storrs Expt. Stat., 1890, p. 158.
[69] Freudenreich, Fühl. Landw. Ztg. 43: 361.
[70] Harrison, Bull. 120 Ont. Agr'l. Coll., May, 1902.
[71] Milch Zeit. 22:569.
[72] Marshall, Bull. 146, Mich. Expt. Stat., p. 16.
[73] Grotenfelt, Milch Zeit., 1889, p. 263.
[74] Menge, Cent. f. Bakt., 6:596; Keferstein, Cent. f. Bakt., 21:177.
[75] Heim, Arb. a. d. Kais. Gesundheitsamte, 5:578.
[76] Adametz, Milch Zeit., 1890, p. 225.
[77] 12 Rept. Wis. Expt. Stat., 1895, p. 148; also Bull. 67, Ibid., June, 1898.