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- Williams, Mabel B 2
- Bickersteth, John Burgon 1
- Busk, Douglas 1
- Canadian Northern Railway 1
- Curwood, James Oliver 1
- Geological Survey of Canada 1
- Groves, Naomi Jackson 1
- Hazard, Joseph Taylor 1
- MacGregor, James G 1
- McMaster University (Hamilton, Ontario). Dept. of Geography. Karst Research Group 1
- Reader's Digest 1
- Scharff, Robert 1