@BOOK{NAP21, author = "National Research Council", title = "The Effects on Human Health of Subtherapeutic Use of Antimicrobials in Animal Feeds", isbn = "978-0-309-03044-1", doi = "10.17226/21", url = "https://nap.nationalacademies.org/catalog/21/the-effects-on-human-health-of-subtherapeutic-use-of-antimicrobials-in-animal-feeds", year = 1980, publisher = "The National Academies Press", address = "Washington, DC" }