Bolstad Paul. GIS fundamentals: A first text on geographic information systems/ Paul Bolstad. - 4th edition. - Minnesota Eider Press,2303 4th street St. white Bear Lake April,2012. - x,674p.; ill. 25cm ISBN: 9780971764736 Subjects--Personal Names: LC Class. No.: G 70.212 / .B 2012 Dewey Class. No.: