Chang, Kang-Tsung Introduction to Geographic Information Systems/ Kang-Tsung Chang - 4th - Boston: McGraw-Hill, 2008 - xiv, 450 p. : il., mapas ; 24 cm + 1 disco compacto ; 4 3/4 plg ISBN: 9780073051154 Subjects--Topical Terms: Information Systems LC Class. No.: G70.212 / .C4735 2008