1. Appleman, R. D., and C. F. Micke. 1973. Motion and time studies of milking parlor and routines. Univ. Nebraska Res. Bull. 25 3:1.
2. Armstrong, D.V. 1976. Effect of milking shift length on operator efficiency. United Dairyman of Arizona, July:6.
3. Design and performance of walk through parlor;Armstrong,1978
4. Armstrong, D. V. 1979. Trigon milking parlor.West. Reg. Ext. Publ. 27.
5. Milking parlor performance in the 80's;Armstrong;Dairy Sci. Handbook,1980