Collection search - Bedrock topography of the Grande Prairie area NTS 83M, Alberta, West of Fifth Meridian. Alberta Research. Bedrock topography by V.A. Carlson and D.A. Hackbarth, 1974. Date compilation:J. Gordeyko. Drafting: R.W. Swenson. Cartographic editing F.H. Smith. Published 1974. [cartographic material]