Incoming Resources
- Clearfield Company, Baltimore, 1997
- Clearfield Company, Baltimore, Maryland, 2017
- Clearfield Company, Baltimore, 2001, c1977
- Clearfield Company, Baltimore, MD, 1990, 1935
- Clearfield Company, Baltimore, 1991
- Clearfield Company, Baltimore, Md., 1998
- Clearfield Company, Genealogical Pub. Co., Baltimore, 2001,1903
- Clearfield Company, Baltimore, Md., 2002
- Clearfield Company, Baltimore, Maryland, 2020
- Clearfield Company, Baltimore, 1999, c1995
- Clearfield Company, Baltimore, Md., 1999, c1983