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