TY  - BOOK
AU  - North, Gerald
TI  - Advanced amateur astronomy
SN  - 9780521574075
U1  - 520 NOR 
PY  - 1997///
CY  - Cambridge
PB  - Cambridge Univeristy Press
KW  - Astronomy
KW  - Astronomy - Amateurs' manuals
KW  - Telescopes
N1  - Includes bibliographical references (p. 379-393) and index
ER  -