Observing Variable Stars -- A Guide for the Beginner; Levy, David H.
Observer's Guide to Astronomy : Vol 1 -- Martinez, Patrick
Object Success: A Managers Guide To Object Orientation, Its Impact On The Corporation, And Its Use For Reengineering The Software Pro -- Meyer, Bertrand
Observers Guide To Astronomy -- Editor Martinez, Patrick / Translator Dunlop, Storm
Observing Guide To The Messier Marathon: A Handbook And Atlas -- Machholz, Don
Obstetrics and Gynecology -- An Integrated Textbook and Atlas; Apgar, Barbara S. (Department of Family Medicine, University of Michigan Medical School, Ann Arbor, USA);Brotzman, Gregory L. (Medical College of Wisconsin, Columbia Family Care Center, M Atlas Of Pain Management Injection Techniques; Waldman, Steven D.