TY  - BOOK
AU  - Duffett-Smith, Peter
TI  - Practical astronomy with your calculator
SN  - 0-521-35699- 7
PY  - 1990///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Astronomy
KW  - Astronomy and astrophysics thesaurus
KW  - Calculators
ER  -