Data was derived from these sources:
Stalker 1956: This bulletin includes a paper map that was scanned. The map was georeferenced in ArcGIS, then the points were digitized.
Boydell 1972: Locations reported in Appendix D were entered into Excel, then plotted in ArcGIS.
Roed 1975: Figure 1 was georeferenced in ArcGIS, then the points digitized.
Jackson et al. 2008: Figure 5 was georeferenced in ArcGIS, then the points digitized.
Tharin 1969: Figure 1 was georeferenced in ArcGIS, and points in the Athabasca valley were digitized. Other points were not included because they are apparently covered in more detail by other reports cited.
For all of these sources:
Data was visually examined in ArcGIS to confirm locations were consistent with source publications, but sites were not field checked.