References
- International Planetarium Society. 1980 . Planetarium Educators Workshop/Guide This can be obtained from The Spaceshop, Strasenburgh Planetarium, P.O.B. 1480, Rochester, New York 14603.
- Mayall , Newton and Mayall , Margaret. 1987 . The Sky Observer' Guide , Racine , WI : Golden Press, Western Publishing Company .
- Ronan , Colin and Dunlop , Storm. 1984 . The Golden Book of Astronomy , Racine , WI : Golden Press, Western Publishing Company .