@book{52114,
	author = {Conference on Chemical Aeronomy and Zelikoff, M.},
	title = {The threshold of space :},
	publisher = {Published by the Symposium Division, Pergamon Press,},
	year = {c1957.},
	address = {London :},
	note = {Sponsored by Geophysics Research Directorate of the Air Force Cambridge Research Centre, Air Research and Development Command coordinated by Wentworth Institute.}
}