@book{163643,
	author = {Portree, David S. F. and Treviño, Robert C.},
	title = {Walking to Olympus},
	publisher = {NASA History Office, Office of Policy and Plans, NASA Headquarters},
	year = {[1997]},
	series = {Monographs in aerospace history series},
	address = {Washington, DC},
	note = {"October 1997."}
}