共 10 条
- [1] BETHKE RM, 1929, POULTRY SCI, V8, P257
- [3] CARVER J. S., 1942, POULTRY SCI, V21, P260, DOI 10.3382/ps.0210260
- [4] Evans Robert John, 1944, POULTRY SCI, V23, P351, DOI 10.3382/ps.0230351
- [5] Halpin, 1930, POULTRY SCI, V9, P296
- [6] Hammond John C, 1944, POULTRY SCI, V23, P239, DOI 10.3382/ps.0230239
- [7] MUSSEHL F. E., 1935, POULTRY SCI, V14, P147, DOI 10.3382/ps.0140147
- [8] Nowotarski J. S., 1943, POULTRY SCI, V22, P72, DOI 10.3382/ps.0220072
- [9] TITUS H. W., 1939, Yearbook of the United States Department of Agriculture, P787
- [10] Willgeroth G. B., 1944, JOUR ASSOC OFFIC AGRIC CHEM, V27, P289