1. Armstrong, D. V., J. A. Speicher, and W. G. Bickert. 1973. Comparisons of equipment for mechanizing the milking of cows. Nat. Dairy Housing Conf. Proc., ASAE Special Pub. SP-01-73, St. Joseph, MI.
2. Rotary parlors: what are your choices?;Bickert;Hoard's Dairyman,1972
3. Rotary parlors: how fast are they?;Bickert;Hoard's Dairyman,1972
4. Considerations before buying a rotary parlor;Bickert;Hoard's Dairyman,1973
5. Semi-automatic milking in a polygon parlor: a simulation;Bickert;Trans. ASAE,1972