@BOOK{NAP20682, title = "Nutrient Requirements of Beef Cattle: Revised 1958", doi = "10.17226/20682", url = "https://nap.nationalacademies.org/catalog/20682/nutrient-requirements-of-beef-cattle-revised-1958", year = 1958, publisher = "The National Academies Press", address = "Washington, DC" }