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- Alberta. Environment Conservation Authority
- Gadd, Ben 26
- Parks Canada 20
- Alberta. Laws, statutes, etc 19
- Luxton, Eleanor 18
- Luxton, Norman 18
- Wardle, Dorothy 14
- Birney, Earle 12
- Ford, Theresa M., ed 11
- Metropolitan Museum of Art (New York) 11
- Canada. National and Historic Parks Branch 10
- Russell, Andy 10