References
- The Physical Universe - An Introduction to Astronomy - Frank H. Shu
- Observational Astrophysics - Robert C. Smith
- Cosmic Horizons - Understanding the Universe - Wagoner / Goldsmith
- Lonely Heart of the Cosmos - Dennis Overbye
- An Introduction to Cosmochemistry - Charles R. Cowley
- A Unified Grand Tour of Theoretical Physics - Ian D. Lawrie