共 20 条
[1]
ASMUNDSON V. S., 1940, POULTRY SCI, V19, P227, DOI 10.3382/ps.0190227
[6]
FRY JL, 1963, 52 ANN M POULTR ASS
[10]
A DEVICE FOR MEASURING THE STRENGTH OF SHELLS OF EGGS
[J].
POULTRY SCIENCE,
1949, 28 (04)
:621-622