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. (2014, November 21). Rachel M. Barker author page. Retrieved November 21, 2014, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 21 November 2014. <>.
FCIT, "Rachel M. Barker author page." Accessed November 21, 2014..