2425 20160701171705.0 ASTROimport-582 Hensberge, H. 1992 Stellar Long-Slit Spectroscopy in a Nebular Background Verschueren, W. European Southern Observatory Conference and Workshop Proceedings 41 1992 13 http://esoads.eso.org/abs/1992ESOC...41...13H published in NONREF