University of Illinois Urbana-Champaign

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Showing 2191–2220 of 15,773 items
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Negativing Invention
Sherkow, Jacob S.

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Additional Content
Submitter: Howard Ding

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Back Matter
Submitter: Howard Ding

Thumbnail for Heat drying coals at moderate temperatures before coking
Heat drying coals at moderate temperatures before coking
Jackman, Harold Wesley; Helfinstine, Roy John