[A high-pressure hydraulic jet disintegrates clay on what was once the bottom of Steep Rock Lake, Ontario, so that iron ore can be mined]

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[A high-pressure hydraulic jet disintegrates clay on what was once the bottom of Steep Rock Lake, Ontario, so that iron ore can be mined]

Digital ID: (b&w film copy neg.) cph 3c15219 http://hdl.loc.gov/loc.pnp/cph.3c15219
Reproduction Number: LC-USZ62-115219 (b&w film copy neg.)

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