Watson, David F. Contouring a guide to the analysis and display of spatial data : with programs and diskette / David F. Watson. - Kidlington : Pergamon, 1996. - xvii, 321 p. : il. - Computer methods in the Geosciences ; Volume 10 . Practical contouring - Principles of contouring. ISBN: 0080402860 Subjects--Topical Terms: CARTOGRAFIAVISUALIZACION DE DATOS ESPACIALES Universal Decimal Class. No.: 528.9