@BOOK{NAP748, author = "National Research Council", title = "Space Science in the Twenty-First Century: Imperatives for the Decades 1995 to 2015, Overview", isbn = "978-0-309-03838-6", doi = "10.17226/748", url = "https://nap.nationalacademies.org/catalog/748/space-science-in-the-twenty-first-century-imperatives-for-the", year = 1988, publisher = "The National Academies Press", address = "Washington, DC" }