Kogerman, Paul2017-03-082017-03-0819229789949807161Est.A-2838http://hdl.handle.net/10062/55657engCC0 1.0 Universalhttp://creativecommons.org/publicdomain/zero/1.0/keemiapõlevkiviEstonica koguThe chemical composition of the Esthonian M.-Ordovician oil-bearing mineral "Kukersite"Book