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[1]
Boutwell R. K., 1943, JOUR DAIRY SCI, V26, P429, DOI 10.3168/jds.S0022-0302(43)92738-9
[2]
SCHANTZ E. J., 1940, JOUR DAIRY SCI, V23, P181, DOI 10.3168/jds.S0022-0302(40)95508-4