Pears cyclopaediaChris Cook, L. Mary Barker · First published 1977 · Latest edition 1982Open the Tome
Natural resources of British Columbia and the YukonMary L. Barker · First published 1977Open the Tome
Natural Resources of British Columbia and the Yukon TerritoryMary L. Barker · First published 1977Open the Tome
Water resources and related land uses, Strait of Georgia-Puget Sound BasinMary L. Barker · First published 1974Open the Tome
