@BOOK{NAP9254, title = "The Global Positioning System for the Geosciences: Summary and Proceedings of a Workshop on Improving the GPS Reference Station Infrastructure for Earth, Oceanic, and Atmospheric Science Applications", doi = "10.17226/9254", url = "https://nap.nationalacademies.org/catalog/9254/the-global-positioning-system-for-the-geosciences-summary-and-proceedings", year = 1997, publisher = "The National Academies Press", address = "Washington, DC" }