Wanless, R. K. Rubidium-strontium isochron age studies, report 1 / R K Wanless and W D Loveridge - Ottawa : Geological Survey of Canada, 1972. - 77 p.: chart, map ; 25 cm. - Geological Survey of Canada ; Paper 72-23 . Catalogue No. : M44-72-23 Includes bibliographical references : p.61-66 Subjects--Topical Terms: Geology, Stratigraphic--CanadaRubidium-strontium dating--CanadaPrecambrian Geologic Period--CanadaRocks--Analysis Dewey Class. No.: 551.7