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Charles Horace Clapp

Geology of the Nanaimo map-area
Geology of the Victoria and Saanich map-areas, Vancouver Island, B.C.
Sooke and Duncan map-areas, Vancouver Island
Southern Vancouver Island
Géologie de la carte-feuille de Nanaïmo
Sooke and Duncan Map-Areas, Vancouver Island (Classic Reprint)
Southern Vancouver Island (Classic Reprint)