Kulapa Polratana. 2004. Effects of exogenous recombinant bovine somatotropin (rbST) on mammary function in late lactating crossbred Saanen goats. Field of Study Animal Physiology, Chulalongkorn University;
Kulapa Polratana. (2004) Effects of exogenous recombinant bovine somatotropin (rbST) on mammary function in late lactating crossbred Saanen goats . Chulalongkorn University/Bangkok.
Kulapa Polratana. Effects of exogenous recombinant bovine somatotropin (rbST) on mammary function in late lactating crossbred Saanen goats. . Bangkok:Chulalongkorn University, 2004.
Kulapa Polratana. (2004) Effects of exogenous recombinant bovine somatotropin (rbST) on mammary function in late lactating crossbred Saanen goats . Chulalongkorn University/Bangkok.