Concepts and techniques of geographic information systems 2026-02-15T19:44:25+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from session cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Lo, C. P. (Chor Pang), 1939; Yeung, Albert K. W. (Pearson Prentice Hall, 2007)