Leonard Benjamin Riley

A Manual on Fire Assaying and Determination of the Noble Metals in Geological Materials

Detailed Description of Techniques and Methods of Analysis

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Determination of Gold in Geologic Materials by Solvent Extraction and Atomic-absorption Spectrometry

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Elemental Composition of Colorado Plateau Sandstone-type Uranium Deposits

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Rocks and Mineral Resources of the Wolf Creek Area, Lewis and Clark and Cascade Counties, Montana

A Descriptive Report on an Area in the Disturbed Belt Along the Eastern Front of the Northern Rocky Mountains in Western Montana

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U.S. Geological Survey Heavy Metals Program Progress Report 1968

Topical Studies

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A Manual on Fire Assaying and Determination of the Noble Metals in Geological Materials

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A Manual on Fire Assaying and Determination of the Noble Metals in Geological Materials

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