Vargas, J. C., D. Benítez, Verena Torres, Sandra Ríos, and Sandra Soria. “Factors Determining the Efficiency of Milk Production in Systems of Double Purpose in Pastaza Province, Ecuador”. Cuban Journal of Agricultural Science 49, no. 1 (February 26, 2016). Accessed November 23, 2024. https://cjascience.com/index.php/CJAS/article/view/541.