TY  - BOOK
AU  - Fix,John D.
TI  - Astronomy: journey to the cosmic frontier 
SN  - 0072898542 (acid-free paper)
U1  - 520 21
PY  - 1999///
CY  - Boston
PB  - WCB/McGraw-Hill
KW  - Աստղագիտություն
N1  - Includes bibliographical references and index
ER  -