Campbell, John Michael2006-07-282006-07-2819961996http://hdl.handle.net/10012/139application/pdf17972962 bytesapplication/pdfenCopyright: 1996, Campbell, John Michael. All rights reserved.Harvested from Collections CanadaThe declining role of the earth sciences in the planning, management and interpretation of Canada's national parks, identification, documentation, possible causes, and means of reversalDoctoral Thesis