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, May 22). Rachel M. Barker author page. Retrieved May 22, 2015, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 22 May 2015. <>.
FCIT, "Rachel M. Barker author page." Accessed May 22, 2015..