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, September 01). Rachel M. Barker author page. Retrieved September 01, 2015, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 01 September 2015. <>.
FCIT, "Rachel M. Barker author page." Accessed September 01, 2015..