ARROYO-AGUILÚ, José A.; EVANS, Joe L. The Use of Chromium and Acid-Detergent Lignin in Complete Rations as Indicators of the Fecal Excretion Rate in the Ruminant Animal. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 54, n. 4, p. 660–675, 1970. DOI: 10.46429/jaupr.v54i4.10934. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/10934. Acesso em: 25 apr. 2024.