{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Humans to Mars: Fifty Years of Mission Planning, 1950-2000. NASA Monograph in Aerospace History, No. 21, 2001 (NASA SP-2001-4521)","author_name":"David S.F. Portree, NASA History Division","thumbnail_url":"https://www.ebooknetworking.net/books/178/039/big1780393059.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1780393059.html\">Humans to Mars: Fifty Years of Mission Planning, 1950-2000. NASA Monograph in Aerospace History, No. 21, 2001 (NASA SP-2001-4521)</a>","width":400,"height":300}