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Jaap R. George, 1944, POULTRY SCI, V23, P249, DOI 10.3382/ps.0230249
[2]
Lorenz F. W., 1944, POULTRY SCI, V23, P458, DOI 10.3382/ps.0230458
[3]
LORENZ F. W., 1943, Poultry Science, V22, P190, DOI 10.3382/ps.0220190
[5]
Thayer Rollin H., 1944, POULTRY SCI, V23, P555