Material flow analysis of Estonian oil-shale industryRandla, Tiina; Gavrilova, Olga; Vilu, RaivoWorkshop "Quo vadis MFA?" : Material Flow Analysis - Where do we go? : Issues, Trends and Perspectives of Research for Sustainable Resource use : 08.-10. October 2003, Wuppertal Institute : abstract - reader parallel sessions2003 / [1] p