TY  - BOOK
AU  - Duffet-Smith,Peter
TI  - Practical astronomy with your calculator
SN  - 0521227615
AV  - QB62.5 .D83 1979
U1  - 522.076  22nd ed.
PY  - 1979///
CY  - Cambridge
PB  - Cambridge University
KW  - Astronomy
KW  - Problems, exercises, e.t.c
KW  - Calculators
N1  - Includes index
ER  -