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, July 31). Rachel M. Barker author page. Retrieved July 31, 2015, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 31 July 2015. <>.
FCIT, "Rachel M. Barker author page." Accessed July 31, 2015..