Hougaard, G., Jepsen, H. and Neve, J. 1991. GGU’s photogeological laboratory: aerial photogrammetry – a valuable geological mapping tool in Greenland. Rapport Grønlands Geologiske Undersøgelse. 152, (Jan. 1991), 32–35. DOI:https://doi.org/10.34194/rapggu.v152.8150.