@BOOK{NAP689, author = "National Research Council", title = "Emergency and Continuous Exposure Limits for Selected Airborne Contaminants: Volume 1", isbn = "978-0-309-07773-6", doi = "10.17226/689", url = "https://nap.nationalacademies.org/catalog/689/emergency-and-continuous-exposure-limits-for-selected-airborne-contaminants-volume", year = 1984, publisher = "The National Academies Press", address = "Washington, DC" }