1. Atkeson, G. W. 1967. Weighting components of type in classifying Holsteins. M.S. Thesis, Michigan State University, East Lansing.
2. Dairy type: Its importance in breeding and management;Bayley;USDA Tech. Bull.,1961
3. Regressions and correlations between certain type characteristics and between production;Carter;J. Dairy Sci.,1965
4. The Advanced Theory of Statistics;Kendall,1961
5. Changes in type classifications of dairy cattle;McGilliard;J. Dairy Sci.,1956