Prehistoric Soapstone Use in Northeastern Maryland
- Quarries for raw material procurement show variability in their association with a mapped belt of talc and may indicate use of both soapstone and rock similar to soapstone.
- http://antiquity.ac.uk/ProjGall/shaffer/shaffer.html

Diagnostic Artifacts in Maryland
- Introduction to the types of diagnostic artifacts recovered from archaeological sites in Maryland.
- http://www.jefpat.org/diagnostic/