“EFFECT OF BOVINE SOMATOTROPHIN HORMONE ON MILK PRODUCTION IN DAIRY COWS GRASSING DURING RAINY SEASON. BUGABA, CHIRIQUI, PANAMA. 1997”. Ciencia Agropecuaria, no. 15, Feb. 2004, pp. 125-33, https://idiap.desarrollo-ojs1.metadatos.org/index.php/ciencia-agropecuaria/article/view/215.