Minutes XXXIIIrd Executive committee meeting - Jully 12 and 17, 1989 - Washington, D.C., U.S.A. - Norway Geological Survey 1989 - [6],12p. 26cm x 18.5cm Subjects--Topical Terms: International union of geological sciences - Committee Minutes - 1989, U.S.A. Dewey Class. No.: 550 / IUG