NASA NTRS · 19690019023
Earth resources survey program - Ultraviolet absorption and luminescence studies Progress report, Apr. - Dec. 1967
Abstract
Ultraviolet absorption and luminescence study for rock identification
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Hemphill, W. R.. 1968-01-01. Earth resources survey program - Ultraviolet absorption and luminescence studies Progress report, Apr. - Dec. 1967. https://ntrs.nasa.gov/citations/19690019023
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