Bolstad, P. GIS fundamentals: A first text on geographic information systems (4a ed.).
Cita Chicago (17th ed.)Bolstad, Paul. GIS Fundamentals: A First Text on Geographic Information Systems. 4a ed.
Cita MLA (8th ed.)Bolstad, Paul. GIS Fundamentals: A First Text on Geographic Information Systems. 4a ed.
Atenció: Aquestes cites poden no estar 100% correctes.