Symposium SSD Zurich, Switzerland, Günther, O., & Schek, H. (1991). Advances in spatial databases: 2nd Symposium SSS '91, Zurich, Switzerland, August 28-30, 1991 : proceedings. Springer-Verlag.
Chicago Style (17th ed.) CitationSymposium SSD Zurich, Switzerland, Oliver Günther, and H.-J Schek. Advances in Spatial Databases: 2nd Symposium SSS '91, Zurich, Switzerland, August 28-30, 1991 : Proceedings. Berlin ; New York: Springer-Verlag, 1991.
MLA (9th ed.) CitationSymposium SSD Zurich, Switzerland, et al. Advances in Spatial Databases: 2nd Symposium SSS '91, Zurich, Switzerland, August 28-30, 1991 : Proceedings. Springer-Verlag, 1991.
Warning: These citations may not always be 100% accurate.