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, February 10). Rachel M. Barker author page. Retrieved February 10, 2016, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 10 February 2016. <>.
FCIT, "Rachel M. Barker author page." Accessed February 10, 2016..