共 20 条
[11]
B-MODE GRAY-SCALE ULTRASOUND - IMAGING ARTIFACTS AND INTERPRETATION PRINCIPLES
[J].
VETERINARY RADIOLOGY,
1981, 22 (05)
:204-210
[12]
PECKMAN RD, 1987, THERIO, V27, P431
[14]
RIERA GS, 1984, 10TH P INT C AN REPR
[15]
TRAPP MJ, 1983, J ANIM SCI, V57, P1
[16]
WANI GM, WORLD REV AN PROD, V17, P43
[18]
WHITE IR, 1984, UNPUB DETERMINATION, P200
[19]
Wilkins J. F., 1984, Reproduction in sheep., P182
[20]
WILSON J, 1986, P SHEEP VET SOC, V11, P45