@BOOK{NAP20048, title = "Nutrient Requirements of Horses: Fourth revised edition, 1978", doi = "10.17226/20048", url = "https://nap.nationalacademies.org/catalog/20048/nutrient-requirements-of-horses-fourth-revised-edition-1978", year = 1978, publisher = "The National Academies Press", address = "Washington, DC" }