@inproceedings{TUW-119341, author = {Gerstbach, Gottfried}, title = {Mars Channel Observations 1877-90, Compared with Modern Orbiter Data}, booktitle = {Proceedings XIII National Conf. of Yug. Astronomers}, year = {2002}, organization = {M. Turin, M. Cirkovic, F. Adams / Univ. Belgrade}, publisher = {TU Vienna, Institute of Geodesy and Geophysics} }