TY  - BOOK
AU  - Palan, Stacy
AU  - Kay,Laura
AU  - Smith,Brad
AU  - Blumenthal,George
TI  - Understanding our universe 
SN  - 9780393912104 (pbk.)
AV  - QB43.3 .U565 2012
U1  - 520 22
PY  - 2012///
CY  - New York
PB  - W.W. Norton
KW  - Astronomy
KW  - Textbooks
N1  - Includes bibliographical references and index
ER  -