1. The Space Shuttle's impact on the stratosphere;Prather;J. geophys. Res.,1990
2. STS-32 launch effects summary report;Hall;Bionetics Corp. Doc. No. Bio-ENV-007,1990
3. Assessment of the impact of chemical propulsion exhaust species on stratospheric ozone;Kolb,1990
4. Effects of Space Shuttle launches STS-1 through STS-9 on terrestrial vegetation;Schmalzer,1985