REFERENCES
1. Meisinger, C. L. "Constant Elevation Free-balloon Flights from Fort Omaha," *Monthly Weather Review*, Vol. 47, pp. 535-538, 1919.
2. "Progress in Developing a Constant-Level Balloon", Report by Dewey and Almy Chemical Company, Cambridge, Massachusetts, June 15, 1944.
3. "Analysis of Japanese Weather Service", Air Weather Service Technical Report 45-1, Langley Field, Virginia, May, 1946,
4. Clarke, E.T., Korff, S.A., "The Radiosonde: The Stratosphere Laboratory", *Journal of the Franklin Institute*, Vol. 232, No. 3, September, and No. 4, October, 1941.
5. Middleton, W.G.K., *Meteorological Instruments*, Toronto, Canada, 1941, p. 46.
6. "Aerological Observations", *Monthly Weather Review*, Vol. 71, pp. 202-3, 1943.
7. Brombacher, W. G., "Altitude-Pressure Tables Based on the United States Standard Atmosphere", *Report No. 538, National Advisory Committee for Aeronautics*, Washington, D. C. September, 1935.
8. Timoshenko, MacCullough, *Elements of Strength of Materials*, Vol. 1, p. 51.
9. Lange, K. O., Unpublished Report, Lexington, Kentucky, 1947.
10. Warner, E. P., *Aerostatics*, The Roland Press Co., New York, 1926.
11. "The National Geographic Society - "U.S. Army Air Corps Stratosphere Flight of 1934 in the Balloon 'Explorer'", *Contributed Technical Papers of the National Geographic Society*, Washington, 1935.
12. The National Geographic Society - "U.S. Army Air Corps Stratosphere Flight in the Balloon 'Explorer II'", *Contributed Technical Papers of the National Geographic Society*, Washington, 1936.
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