Rachel M. Barker wrote informational public documents for the United States Geological Survey.
- Collecting Rocks
- The author discusses the historical significance of rocks. Tips for the proper collection, identification, classification, and housing of rocks are presented to the reader.
FCIT. (2021, September 19). Rachel M. Barker author page. Retrieved September 19, 2021, from
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FCIT, "Rachel M. Barker author page." Accessed September 19, 2021..