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, October 06). Rachel M. Barker author page. Retrieved October 06, 2015, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 06 October 2015. <>.
FCIT, "Rachel M. Barker author page." Accessed October 06, 2015..