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. (2018, February 23). Rachel M. Barker author page. Retrieved February 23, 2018, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 23 February 2018. <>.
FCIT, "Rachel M. Barker author page." Accessed February 23, 2018..