Christine B. Williams M. Lynne Markus Michael Tyworth Steve Sawyer Martin Dias Sonia Vilvovsky Jane Fedorowicz Dax Jacobson Mapping theory to practice: a cartographic analysis of public safety networks. 171-180 2008 DG.O http://doi.acm.org/10.1145/1367832.1367863 conf/dgo/2008 db/conf/dgo/dgo2008.html#WilliamsMTSDVFJ08