NASA Armstrong Flight Research Center's Contributions to the Space Shuttle ProgramChristian Gelzer, Michael Chandler, Gray Creech, George Grimshaw · First published 2021Open the Tome
Apollo and America's Moon Landing Program : Unconventional, Contrary, and UglyWorld Spaceflight News, Gene J. Matranga, C. Wayne Ottinger, Calvin R. Jarvis, D. Christian Gelzer · First published 2018Open the Tome
Lunar Landing Research VehicleAeronatics Administration, Donald Mallick, Peter Merlin, Christian Gelzer · First published 2016Open the Tome
Spoken Word IIINational Aeronautics Administration, Christian Gelzer · First published 2014Open the Tome
Fairing WellChristian Gelzer, National Aeronautics And Administration · First published 2010 · Latest edition 2013Open the Tome
