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[1]
CARTER CW, 1946, TEXAS AGR EXPT 1946
[2]
HARSHAW H. M., 1940, Poultry Science, V19, P404, DOI 10.3382/ps.0190404
[4]
LASLEY EL, 1949, N DAKOTA AGR EXPT ST, V355, P1
[5]
LUCAS WC, 1949, DELAWARE AGR EXPT ST, V279, P1