1. X-ray observations of flow patterns in a mercury boiler Author/Creator: Vary, Alex, author Publication/Creation: Washington, D.C. : National Aeronautics and Space Administration, June 1970 Resource Type: Book Access & Availability: Loading
2. X-15 : extending the frontiers of flight Author/Creator: Jenkins, Dennis R., author Publication/Creation: Washington D.C. : National Aeronautics and Space Administration, NASA Headquarters, [2007] Resource Type: Book Access & Availability: Loading