A title in the classic Winston series of juvenile science fiction, written by some of those who would go on to be among the most respected writers in the genre, and by those with a knowledge and background. Introduction by Del Rey called 'Dreams That Become Reality' in which he talks about the actual work being done on space exploration starting with Hermann Oberth.
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Used availability for Lester del Rey's Mission To the Moon
October 2015 : Paperback
March 2014 : USA, Canada, UK Kindle edition