1. Ultrasonic measurement of teat milk flow;Delwiche;Trans. ASAE,1980
2. Change over designs;Federer,1955
3. History and development;Hall,1977
4. Magee, C. 1980. A comparison of three milking units in terms of milking performance and influence on organism transport. Ph.D. thesis, Cornell Univ., Ithaca, NY.
5. Action of conventional milking unit;Mein,1978