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. (2015, November 29). Rachel M. Barker author page. Retrieved November 29, 2015, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 29 November 2015. <>.
FCIT, "Rachel M. Barker author page." Accessed November 29, 2015..