@BOOK{NAP583, author = "National Research Council", title = "Continuing Education of Engineers", isbn = "978-0-309-03593-4", doi = "10.17226/583", url = "https://nap.nationalacademies.org/catalog/583/continuing-education-of-engineers", year = 1985, publisher = "The National Academies Press", address = "Washington, DC" }