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, February 26). Rachel M. Barker author page. Retrieved February 26, 2015, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 26 February 2015. <>.
FCIT, "Rachel M. Barker author page." Accessed February 26, 2015..