@BOOK{ Book!D - 90038334, AUTHOR = " Charles Keeton", TITLE = "Principles of astrophysics :", LIBRARY= "مرکز و کتابخانه مطالعات اسلامی به زبان‌های اروپایی", SUBJECT = "Astrophysics", URL = "/book/90038334/Principles-of-astrophysics/"}