TY  - BOOK
AU  - Protheroe,W.M.
AU  - Capriotti,E.R.
AU  - Newsom,G.H.
TI  - Exploring the universe
SN  - 0675083133
AV  - QB45 .P76
U1  - 520 
PY  - 1979///
CY  - Columbus
PB  - Merrill
KW  - Astronomy
N1  - Includes index; Bibliography: p. 413-418
ER  -