Incoming Resources
- Blackstone Audio, Inc., Harper Audio, Ashland, Oregon, 2014
- Harper Audio, S.l., cp2007
- Harper Audio, New York, NY, 2021
- Harper Audio, New York, N.Y., p2009
- Harper Audio, New York, 2016
- Harper Audio, New York, c1999
- Harper Audio, New York, NY, 2022
- Harper Audio, New York, 2014
- Harper Audio, New York, p2004
- Harper Audio, New York, c2007
- Harper Audio, New York, p2010
- Harper Audio, New York, p2002
- Harper Audio, New York, 2018
- Harper Audio, New York, pc2007, c1996
- Harper Audio, New York, NY, 2001, c2005