Arroyo-Aguilú JA, Evans JL. The Use of Chromium and Acid-Detergent Lignin in Complete Rations as Indicators of the Fecal Excretion Rate in the Ruminant Animal. JAUPR [Internet]. 1970 Oct. 1 [cited 2024 Nov. 22];54(4):660-75. Available from: https://revistas.upr.edu/index.php/jaupr/article/view/10934