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Melbourne Slate Company

By Melbourne Slate Company.,Melbourne Slate Company

Roofing slate, as a source of wealth to Canada

By Bell, Robert

The Utica slate formation

By Henry Marc Ami

Prospectus of the Douglas Slate Quarry, &c. of the province of Nova Scotia

By Douglas Slate Quarrying Company of Nova Scotia

Prospectus of the Sherbrooke Slate Company, (Limited)

By Sherbrooke Slate Company

Newfoundland's slate quarries

By Newfoundland Slate Quarries

Répertoire numérique du fonds 234 J

By Archives départementales de la Mayenne.