@BOOK{NAP6353, author = "Transportation Research Board", title = "NCHRP Web Doc 14 Laboratory Determination of Resilient Modulus for Flexible Pavement Design: Final Report", doi = "10.17226/6353", url = "https://nap.nationalacademies.org/catalog/6353/nchrp-web-doc-14-laboratory-determination-of-resilient-modulus-for-flexible-pavement-design", year = 1997, publisher = "The National Academies Press", address = "Washington, DC" }