The Master Surname Index (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists PETERSON and PEDERSON burials in the Griffin Creek cemetery at Berwyn some 15 miles west of Whitelaw. But no Olaf or Olie. But there is this Norman James PETERSON, 27 Dec 1929 - 10 Oct 1935 in the Berwyn cemeetery.
You can that History book here under Fairview,
http://www.rootsweb.com/%7Ecanab/lookup.htmlbut there is no volunteer.
For further research please contact the AGS Research Services Committee of the Edmonton Branch,
http://abgensoc.ca/Peter