Hofmann-Wellenhof, B GPS: theory and practice. - 5th rev. ed. ,/ B. Hofmann-Wellenhof, H. Lichtenegger, J. Collins - 5th rev. Ed. - New Delhi Springer (India) Private limited 2007 - xxii, 382p. ISBN: 9 788181 287519 Subjects--Topical Terms: Surveying.