DescriptionNl-operationeels.ogg Wikiwoordenboek audio Date 18 February 2017 Source Own work Author Marcel coenders...
DescriptionNl-operationeel.ogg Dutch pronunciation Date 13 November 2013 Source Own work Author Marcel coenders...
Zimmerman en Space. Artikel over Viking 1 uit De Volkskrant: https://resolver.kb.nl/resolve?urn=ABCDDD:010881102:mpeg21:p005 Chryse Planitia in Google Mars: https://www...