peoplepill id: robert-hallowell-richards
RHR
United States of America
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Robert Hallowell Richards
American academic

Robert Hallowell Richards

The works

Books

Sources:
Openlibrary
Ore Dressing: In Four Volumes & Index
1903

Ore Dressing: In Four Volumes & Index

Ore dressing
1903

Ore dressing

Textbook of ore dressing
1940

Textbook of ore dressing

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Robert Hallowell Richards
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