compiled at the Geological Surveys of Finland, Norway and Sweden ; this map is a result of Nordic collaboration supported by the Nordic Council of Ministers ; this map is a result of the Nordkalott Project, a joint venture (1980-1986)Nordkalott Project1987
prepared by the Exploration Department of Shell Oil Company, Houston, Texas ; edited by T. D. Cook and A. W. Bally ; compiled by S. Milner ... [et al.] ; cartography and drafting by W. C. Heuer ... [et al.]Princeton University Pressc1975