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- Canadian Government, Government of Alberta, Government of Ontario, Canadian Pacific, National Parks of Canada 1
- Groves, Naomi Jackson 1
- MacGregor, James G 1
- McMaster University (Hamilton, Ontario). Dept. of Geography. Karst Research Group 1
- Morant, Nicholas 1
- Reader's Digest 1
- Scharff, Robert 1
- Williams, Mabel B 1