Kopera, J. P., P. House, K., Schmidt, M. & Clark, R. Guiding principles for use of digital technology in geologic data collection and distribution. Abstracts with Programs - Geological Society of America 46, 75 - 75 (2014).

Kopera, J. P., Mabee, S. B., Salamoff, S. A. & Hildreth, C. An update of geologic mapping in Massachusetts. Abstracts with Programs - Geological Society of America 36, 58 - 58 (2004).

MA DCR - Office of Water Resources Rainfall Program. at <http://www.mass.gov/dcr/waterSupply/rainfall/index.htm>

The Massachusetts DEP Hydrogeologic Information Matrix. at <http://www.mass.gov/eea/docs/dep/water/compliance/hydromat.pdf>

National Geologic Map Database. at <http://ngmdb.usgs.gov/>

Reading Maps with a Critical Eye: Becoming an Informed Map Reader. at <http://www.maine.gov/doc/nrimc/mgs/mapuse/informed/informed.htm>

USGS Publications Warehouse. at <http://infotrek.er.usgs.gov/pubs/>

What 7.5' quadrangle am I in?: A PDF of a paper map. at <http://www.geo.umass.edu/stategeologist/Quads_Towns_WS7_34x44.pdf>

What 7.5' quadrangle am I in?: KMZ of 7.5" quadrangles for use in Google Earth. at <http://www.geo.umass.edu/stategeologist/QuadTownsWatersheds.kmz>