Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleOptical spectroscopy of faint X-ray sources in the Lockman Hole.AuthorsSchmidt, M.; Hasinger, G.; Lehmann, I.; Gunn, J.; Schneider, D.; Burg, R.; Giacconi, R.; Mackenty, J.; Trümper, J.; Zamorani, G.PublicationAstronomische Nachrichten, 1998, Vol 319, Issue 1/2, p72ISSN0004-6337Publication typeArticleDOI10.1002/asna.2123190136