A. O. Larsen

Helvite group minerals from syenite pegmatites in the Oslo Region, Norway. Contribution to the mineralogy of Norway, No. 68

A. O. Larsen, 1988 .

Senaite from syenite pegmatite at Tvedalen in the southern part of the Oslo region, Norway

A. O. Larsen, A. O. Larsen, 1989 .