TY  - BOOK
AU  - Shu, Frank H.,
TI  - The physical universe: An introduction to astronomy 
T2  - A series of books in astronomy
SN  - 0935702059
AV  - QB43.2 S48
PY  - 1982///
CY  - Mill valley, california
PB  - University science books
KW  - Astronomía
ER  -