Gorr, Wilpen L., GIS tutorial 1 : basic workbook / Wilpen L. Gorr and Kristen S. Kurland. - 6th. - Califonia: Esri, 2005. - x, 478p.: ill.; 26 cm. include appendix Includes bibliographical references and index. ISBN: 9781589484566 Subjects--Uniform Titles: ArcGIS. LC Class. No.: DUCE G70.212.G74