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, August 20). Rachel M. Barker author page. Retrieved August 20, 2014, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 20 August 2014. <>.
FCIT, "Rachel M. Barker author page." Accessed August 20, 2014..