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, April 18). Rachel M. Barker author page. Retrieved April 18, 2015, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 18 April 2015. <>.
FCIT, "Rachel M. Barker author page." Accessed April 18, 2015..