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Subject: Cement industries
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Usher, Harold, Niagara Advance (Niagara-on-the-Lake, Ontario, Canada), 8 Oct 1980 "Queenston cement works". Article about the Queenston quarries and cement plant there (founded by Isaac Usher in 1880s) written by Harold Usher. "Queenston Cement Mill". A student report prepared byUsher, Harold, Niagara Advance (Niagara-on-the-Lake, Ontario, Canada), 8 Oct 1980 "Queenston cement works". Article about the Queenston quarries and cement plant there …
Black and white photograph of the natural cement plant in Queenston with railway tracks below and groups of employees standing at higher elevations. Queenston Cement Works was founded by Isaac UsherBlack and white photograph of the natural cement plant in Queenston with …
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