1: Herbert, S. and D.S. Bhatnagar, 1988. Genetic trends of economic traits in dairy cattle: A review. Agric. Rev., 9: 200-216.
2: Nelson, R.H., 1943. Measuring the amount of genetic change in a herd average. J. Anim. Sci. Abst., 2: 358-358.
3: Gurdogan, T. and O. Alpan, 1990. The genetic trends of milk yield of Holstein cattle raised at the Ankara Sugar Factory Farms. J. Fac. Vet., 37: 101-115.
4: McDaniel, B.T., R.D. Plowman and R.F. Davis, 1961. Causes and estimation of enviromental change in a dairy herd. J. Dairy Sci., 44: 699-707.
5: Dillon, Jr. W.M., W.W. Yapp and R.W. Touchberry, 1955. Estimates changes in the environmental and average real procuding ability in a Holstein from 1901. J. Dairy Sci., 38: 616-616.
6: Galaas, R.F. and A.D. Plowman, 1961. Effectiveness of statistical adjustments for yearly fluctuations in production. J. Dairy Sci., 44: 1188-1188.
7: Johnson, K.R., D.O. Everson and W.R. Taylor, 1956. The importance of heredity and environment in causing variation in D.H.I.A. records made in idaho. J. Dairy Sci., 39: 1482-1482.
8: Akar, M. and E. Pekel, 1988. A study on genetic and phenotypic trends with the estimation of some parameters in milk yield of purebred and crosses cows raised at the Eskigehir seed Production Farm of the Turkish sugar company. J. Fac. Agric., 3: 51-65.
9: Arave, C.W., R.C. Laben and S.W. Mead, 1964. Measurement of genetic change in twelve California dairy herds. J. Dairy Sci., 47: 278-283.
10: Anonymous, 1991. Reports of Animal Breeding. Agriculture Minister Press, Ankara.
11: Lak, A., 1987. The genetic trends of milk yield of Brown Swiss cattle raised at the Ankara sugar factory farms. Ph.D. Thesis, Faculty of Agriculture, University of Ankara.
12: Kaygisiz, A., 1993. The genetic analsis of Brown Swiss cattle raised at the Regional Agricultural School in Van. Ph.D. Thesis, Faculty of Agriculture, University of Yuzuncu Yil. Van.
13: Harvey, W.R., 1987. User's Guide for LSMLMW PC-1 Version. Ohio State University, Columbus, USA.
14: Lindstrom, U., 1968. Estimation of genetic changes in artificially bred populations of finnish dairy cattle 1. Genetic Change in Populations of Ayrshire Breed in 1961 1966, pp: 174.
15: Yam, V. and O. Duzguneo, 1984. The genetic and phenotypic trends of milk yield of Holstein raised at the Trakya T1GEM Farms. Ph.D. Thesis, Faculty of Agriculture, University of Ankara.