Usage of Estonian oil shaleVäli, Erik; Valgma, Ingo; Reinsalu, EnnoOil shale2008 / 2S, p. 101-114 : ill

Usage of Estonian oil shaleReinsalu, Enno; Valgma, Ingo15th Meeting of the Association of European Geological Societies "Georesources and public policy : research, management, environment" : 16-20 September 2007, Tallinn, Estonia : abstracts2007 / p. 56-57 https://www.ester.ee/record=b2291667*est