TY  - BOOK
AU  - Machholz,Don
TI  - The Observing Guide to the Messier Marathon: A Handbook and Atlas 
SN  - 9780511536458 (ebook)
PY  - 2012///
CY  - Cambridge
PB  - The University Press
KW  - Astronomy
KW  - Observers' manuals
N1  - Includes bibliographic references and index
UR  - http://dx.doi.org/10.1017/CBO9780511536458
ER  -