@book{8b2171034c854c3589da4f1284eab280,
title = "Principles of geographic information systems : an introductory textbook",
keywords = "ESA, GIP, PGM, EOS, NRS, ADLIB-BOOK-461",
author = "{de By}, R.A. and P.Y. Georgiadou and R. Knippers and M.J. Kraak and Yuxian Sun and M.J.C. Weir and {van Westen}, C.J.",
editor = "{de By}, R.A.",
year = "2004",
language = "English",
isbn = "90-6164-226-4",
series = "ITC Educational Textbook Series",
publisher = "International Institute for Geo-Information Science and Earth Observation",
address = "Netherlands",
}