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Robert Eugene Learned

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Analytical results and sample locality map of soil samples from the Tanama-Helecho porphyry copper district, Municipios of Utuado and Adjuntas, Puerto Rico

by Robert Eugene Learned First published in 1992
3 editions

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A geochemical reconnaissance of the Utuado batholith and vicinity, Puerto Rico

by Robert Eugene Learned First published in 1981
3 editions

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Analytical results and sample locality map of soil samples from the Río Viví porphyry copper district, Municipios of Utuado and Adjuntas, Puerto Rico

by Robert Eugene Learned First published in 1992
1 edition

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The solubilities of quartz, quartzcinnabar and cinnabar-stibnite in sodium sulfide solutions and their implications for ore genesis.

by Robert Eugene Learned First published in 1966
1 edition

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Analytical data for stream sediment, heavy-mineral concentrate, and outcrop samples, Sur Medio region, departments of Ica, Ayacucho, and Huancavelica, Peru

by Robert Eugene Learned First published in 1994
1 edition

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OLID: OL2128083A

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