• Talk-serpentinforekomster i Sparbu, Nord-Trøndelag. 

      Mortenson, M. (NGU; Skrifter (290; 4), Journal article, 1973)
      The report presents a technical description of certain talc-serpentine deposits occuring within the Gula Schist Group (Cambrian) of the Trondheim region. No form of contact metamorphism of the schist can be observed along ...