1. Gamma Ray Astrophysics to the Year 2000;Lingenfelter,1988
2. Gamma Ray Astrophysics to the Year 2000;Lingenfelter,1988
3. Astronomy and Astrophysics for the 1990's;Field,1982
4. Astronomy and Astrophysics for the 1990's;Field,1982
5. Astronomy and Astrophysics for the 1990's;Field,1982