1998-10 R.Lo IAF98 Modular Cryogenic Solid Rocket Propellant Grains

1976 R.Lo Propulsion by Laser Energy Transmission

Voslamber Leppich Lo Space Emissions Due to Rocket Launches

1993-5 R.Lo, J.Leppich Emissions Due to Space Activities, Facts+Models

1998-10 R.Lo M.D. Cryogenic Solid Propellant Grains

1999 Roger Lo Space and Ethics, Presentation Foils