Command and Service ModuleScienceBridging a Gap: Bellcomm's 1968 Lunar Exploration ProgramBy David S F PortreeScienceDreaming a Different ApolloBy David S F PortreeScienceAssuming Everything Goes Perfectly Well: NASA's 26 January 1967 AAP Press ConferenceBy David S F PortreeScienceNorth American Aviation's 1965 Mars/Venus Piloted Flyby Study: the Flyby CSMBy David S F PortreeScienceBest of Beyond Apollo VBy David S F PortreeScienceShoestring Bug, Economy Bug, Plush Bug (1961)By David S F PortreeScienceA Forgotten Rocket: The Saturn IBBy David S F PortreeScienceThe Quest to Explore the Moon from Lunar Orbit (1967)By David S F PortreeScienceApollo Returns to Its Earth-Orbital Roots (1971)By David S F PortreeScienceCombining LM Shelter Delivery & Lunar Polar Orbit Mapping (1966)By David S F PortreeScienceBefore the Fire: Saturn-Apollo Applications (1966)By David S F PortreeScienceApollo Lunar Orbit Rescue (1965)By David S F PortreeScienceLunar Accident Site Investigation (1967)By David S F PortreeScienceApollo Space Freighter (1963)By David S F Portree
