1. The concentration of progesterone in the peripheral plasma of the pregnant ewe;Bassett;J. Endocrinol.,1969
2. Multiple pregnancy diagnoses in sheep using pulsed video-fluoroscopy and a semiconductor video store;Beach;N.Z. J. Exp. Agric.,1982
3. Diagnostico precoz de la gestacion en las cabras y ovejas utilizando la ecografia de ultrasonido por via rectal;Botero-Herrera,1984
4. The accuracy of ultrasonic imaging with real time scanners in determining litter number in pregnant ewes;Fowler,1982
5. The comprehensive use of Doppler ultra-sound in farm animal reproduction;Fraser;Vet. Rec.,1971