LONGHORN Roger A Geographic information Value, pricing, production and consumption - Boca Raton CRC Press 2008 - xvi, 230p cm. ISBN: 9780849334146 3944.9400000000001 Source: 632, 06/08/2010, Insat Books & Periodicals General Book Subjects--Topical Terms: Geography Dewey Class. No.: U:(D6, 9(B), P8