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. (2017, December 13). Rachel M. Barker author page. Retrieved December 13, 2017, from
FCIT. "Rachel M. Barker author page." Lit2Go ETC. Web. 13 December 2017. <>.
FCIT, "Rachel M. Barker author page." Accessed December 13, 2017..