1. Radiosonden;Beelitz,1954
2. Federal Meteorological Handbook No. 3 (1997) Rawinsonde and Pibal Observations, FCM-H3-1997. Washington, DC: Office of the Federal Coordinator of Meteorology.
3. The NCAR GPS dropwindsonde;Hock;Bulletin of the American Meteorological Association,1999
4. Oakley T (1998) Instruments and Observing Methods. World Meteorological Organization Report No. 72. Geneva: WMO.
5. Shea DJ, Worley SJ, Stern IR and Hoar TJ (1994) An Introduction to Atmospheric and Oceanographic Data. Report TN-404+1, Boulder, CO: National Center for Atmospheric Research.