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- Parks Canada 27
- Alberta. Environment Conservation Authority 26
- Alberta. Laws, statutes, etc 19
- Gibbons, Wm. JL (Bill Gibbons) 17
- Whyte, Jon 14
- Parks Canada. Western Region 12
- Ford, Theresa M., ed
- Metropolitan Museum of Art (New York) 11
- Bain, Donald M 10
- Birney, Earle 10
- Canada. National and Historic Parks Branch 10
- Russell, Andy 10