Rasmussen, Kjeld. 1988. “Methodology for Multisatellite Thematic Mapping: A Report of the CODATA Task Group on Multisatellite Thematic Map- CODATAI9B6:”. Geografisk Tidsskrift - Danish Journal of Geography 88 (January). https://tidsskrift.dk/geografisktidsskrift/article/view/44584.