Kopera, J. P., DiNitto, R. G. & Hepburn, J. C. Bedrock geologic map of the Marlborough quadrangle, Massachusetts. geologic Map (2004).

Peck, J. A. Digital conversion of Peck, J.H., 1975, Preliminary bedrock geologic map of the Clinton quadrangle, Worcester County, Mass., U.S. Geological Survey Open File Report 75-658. Digital Conversion (2012).

Castle, R. O., Hepburn, J. C. & Kopera, J. P. [Draft] Preliminary bedrock geologic map of the Lawrence quadrangle, Massachusetts. Open-File Report (2005).

Castle, R. O., Hepburn, J. C. & Kopera, J. P. [Draft] Preliminary bedrock geologic map of the South Groveland quadrangle, Massachusetts. Open-File Report (2005).

Castle, R. O., Hepburn, J. C. & Kopera, J. P. [Draft] Preliminary bedrock geologic map of the Wilmington quadrangle, Massachusetts. Open-File Report (2005).

Castle, R. O., Hepburn, J. C. & Kopera, J. P. [Draft]Preliminary bedrock geologic map of the Reading quadrangle, Massachusetts. Open-File Report (2005).

Kopera, J. P. Preliminary Bedrock Geologic Map of the area surrounding Shepley's Hill, Towns of Ayer and Devens, Massachusetts. Open-File Report (2008).

Kopera, J. P. Preliminary bedrock geologic map of the Ayer quadrangle, Massachusetts. Open-File Report (2006). at <http://www.geo.umass.edu/stategeologist/>

Kopera, J. P. & Hansen, W. R. Preliminary Bedrock Geologic Map of the Hudson 7.5' Quadrangle Worcester and Middlesex Counties, Massachusetts. Open File Report (2014).

Kopera, J. P. & Hansen, W. R. Preliminary bedrock geologic map of the Hudson quadrangle, Massachusetts. Open-File Report (2005).

Kopera, J. P., Shaw, C. E. & Fernandez, M. Preliminary bedrock geologic Map of the Milford quadrangle. Open-File Report (2007).

Kopera, J. P., Alvord, D. C., Jahns, R. H., Willard, M. E. & White, W. S. Preliminary bedrock geologic map of the Westford quadrangle, Massachusetts. Open-File Report (2009).

Kopera, J. P. & Shaw, C. J. Preliminary bedrock Geology of the Northern Portion of the Blackstone quadrangle, Massachusetts. Open-File Report (2008). at <http://www.geo.umass.edu/stategeologist/>

Kopera, J. P., Mabee, S. B. & Powers, D. C. Preliminary fracture characterization map of the Ayer quadrangle, Massachusetts. Open-File Report (2006).

Jahns, R. H. & Kopera, J. P. Progress report of bedrock geologic mapping of the Lowell quadrangle, Massachusetts. Progress Map (2010).

Kopera, J. P. & Nathan, S. A. Land area potentially affected by sea level rise along the Massachusetts coast. Open-File Report (2006). at <http://www.geo.umass.edu/stategeologist/>

Kopera, J. P. & Mabee, S. B. Preliminary field report on the November 13th-14th, 2011 landslide near Steam Mill Road, Deerfield, Massachusetts. Open File Report 19 (Massachusetts Geological Survey, 2011). at <http://www.geo.umass.edu/stategeologist/Products/reports/Deerfield_LS_Report_final.pdf>

Mabee, S. B. & Kopera, J. P. Preliminary field report on the Route 2 landslides of tropical storm Irene, August 28, 2011. 18 (Massachusetts Geological Survey, 2011). at <http://www.geo.umass.edu/stategeologist/Products/reports/Rt2_Irene_FieldReport.pdf>