共 7 条
[1]
BURGKART M., 1963, Bayerisches Landwirtschaftliches Jahrbuch, V40, P567
[2]
DUMONT B. L., 1959, Compte Rendu Hebdomadaire des Seances de l'Academie d'Agriculture de France, V45, P628
[4]
KRAUTKRAMER J, 1969, ULTRASONIC TESTING M, pCH2
[6]
SOME FACTORS AFFECTING REPRODUCIBILITY IN ULTRASONIC SCANNING OF ANIMALS 1. CATTLE
[J].
ANIMAL PRODUCTION,
1972, 15 (DEC)
:239-&
[7]
WELLS P, 1969, PHYSICAL PRINCIPLES, pCH1