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. (2016, September 24). Rachel M. Barker author page. Retrieved September 24, 2016, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 24 September 2016. <>.
FCIT, "Rachel M. Barker author page." Accessed September 24, 2016..