共 19 条
- [1] BETHKE R. M., 1931, Poultry Science, V10, P355, DOI 10.3382/ps.0100355
- [3] BETHKE RM, 1928, OHIO EGR EXP STATION, V11
- [4] BETHKE RM, 1930, P 4 WORLDS POULTR C, P342
- [5] Booher LE, 1933, J BIOL CHEM, V102, P39
- [7] Byerly TC, 1933, J AGRIC RES, V46, P0001
- [8] Calvery HO, 1934, J BIOL CHEM, V105, P683
- [10] HALPIN JG, 1933, WISC AGR EXP STATION, V425