Glacial map of Canada. Scale 1:5,000,000 / 
Prest, V. K.
Grant, D. R.
Rampton, V. N.
Geological Survey of Canada.
[Ottawa] :  Department of Energy, Mines and Resources, Geological Survey of Canada, 
1968.
Backed by: Sources of information used in compiling map.
Geological Survey of Canada, Map 1253 A.