TY  - BOOK
AU  - Duffett-Smith,Peter
TI  - Practical Astronomy with your calculator
SN  - 9780521356992
U1  - 522 
PY  - 1988///
CY  - Cambridge [Cambridgeshire]
PB  - Cambridge University Press
KW  - Astronomy
KW  - Problems, exercises, etc
KW  - Calculators
KW  - Astronomy : Calculations
N1  - Includes index
ER  -