The upper atmosphere :
threshold of space /
by John Bird.

APA Citation

Bird, J. (John Clifford)., United States. National Aeronautics and Space Administration. (1988). The upper atmosphere: threshold of space. Washington, D.C.: National Aeronautics and Space Administration.

MLA Citation

Bird, John (John Clifford), 1955-, and United States. National Aeronautics and Space Administration. The Upper Atmosphere: Threshold of Space. Washington, D.C.: National Aeronautics and Space Administration, 1988.