1.
Introductory Astronomy & Astrophysics
by Zeilik, Michael, Gregory, S...
ISBN: 9780030316975
List Price: $65.50
2.
Introductory Astronomy and Astrophysics - Michael Zeilik - Hardcover - 2nd ed
by Zeilik, Michael, Smith, Els...
ISBN: 9780030044991
List Price: $62.00