G.L. Hargrove, C.A. Kiddy, C.W. Young, A.G. Hunter, G.W. Trimberger, R.E. Mather,
Genetic Polymorphisms of Blood and Milk and Reproduction in Holstein Cattle Journal of Dairy Science. ,vol. 63, pp. 1154- 1166 ,(1980) ,
10.3168/JDS.S0022-0302(80)83061-X