Reports and maps of the Geological Survey released only in the open files, 1958
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Geology topics
Betsy Anne Weld
Publications and source records attributed to Betsy Anne Weld.
Reports and maps of the Geological Survey released only in the open files, 1957
Explore the source record for details and available documents.
Circular↗
Reports and maps of the Geological Survey released only in the open files, 1956
Explore the source record for details and available documents.
Circular↗