@BOOK{NAP6237, title = "(NAS Colloquium) The Age of the Universe, Dark Matter, and Structure Formation", doi = "10.17226/6237", url = "https://nap.nationalacademies.org/catalog/6237/nas-colloquium-the-age-of-the-universe-dark-matter-and-structure-formation", year = 1998, publisher = "The National Academies Press", address = "Washington, DC" }