The threshold of space :  the proceedings of the Conference on Chemical Aeronomy / 
edited by M. Zelikoff 
 - New York :  Symposium Publications Division, Pergamon Press,  1957 
 - xi, 342 p. :  ill. ;  26 cm. 
<br/><br/> "Sponsored by Geophysics Research Directorate, Air Force Cambridge Research Center, Air Research and Development Command .. coordinated by Wentworth Institute." 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Atmosphere, Upper--Congresses<br/>Atmosphere--Congresses