TY  - BOOK
AU  - Palen, Stacy ...[et al.].
AU  - Laura Kay
TI  - Understanding our Universe / 
SN  - 9780393912104
U1  - 520 23
PY  - 2012///
CY  - New York : 
PB  - W.W. Norton
KW  - Astronomy -- Textbooks
N1  - Includes bibliographical references and index
ER  -