TY - BOOK AU - National Research Council TI - Urea and Other Nonprotein Nitrogen Compounds in Animal Nutrition DO - 10.17226/18696 PY - 1976 UR - https://nap.nationalacademies.org/catalog/18696/urea-and-other-nonprotein-nitrogen-compounds-in-animal-nutrition PB - The National Academies Press CY - Washington, DC LA - English KW - KW - Agriculture ER -