| Digest Nr | Subject and Author |
|---|
 |
| 2012.02.21.04 | Piano Rolls by Clarence Johnson, from Richard Riley |
| 2010.12.14.08 | Seek Rolls By James Blythe and Clarence Johnson, from Erik York |
| 2009.05.25.01 | Clarence Jacobs, Pianist & Rolla Artis Rolls, from John Phillips |
| 2004.04.16.02 | Clarence Hickman's Ampico B Drafting Table, from Brian Thornton |
| 2003.11.10.04 | Clarence Johnson, Columbia Music Roll Artist, from Benjamin Intartaglia |
| 2003.09.17.06 | Clarence Williams, QRS Piano Roll Artist, from A. B. Bonds |
| 2002.05.08.04 | Clarence Hickman and Magnetic Recording, from Craig Brougher |
| 2000.11.17.06 | Clarence Hickman Recollections, from Gary Stevenson |
| 2000.11.16.01 | Clarence Hickman Recollections, from Randolph Herr |
| 1999.09.12.01 | Clarence Hickman #15 - Closing Remarks, from James L. Brady |
| 1999.09.11.01 | Clarence Hickman #14 - Backing for Bows, from James L. Brady |
| 1999.09.10.02 | Clarence Hickman #13 - President's Medal for Merit, from James L. Brady |
| 1999.09.07.07 | Clarence Hickman #12 - Awards & Societies, from James L. Brady |
| 1999.09.06.06 | Clarence Hickman and Magnetic Recording, from Robbie Rhodes |
| 1999.09.06.05 | Clarence Hickman #11 - Chas. F. Stoddard's Watch, from James L. Brady |
| 1999.09.05.04 | Clarence Hickman Articles, from Ed Sprankle |
| 1999.09.05.03 | Clarence Hickman #9 - Bell Labs & NDRC, from James L. Brady |
| 1999.09.04.09 | Clarence Hickman #9 - Before American Piano Co., from James L. Brady |
| 1999.09.03.06 | Clarence Hickman #8 - University & Marriage, from James L. Brady |
| 1999.09.02.11 | Clarence Hickman #7 - High School, from James L. Brady |
| 1999.08.20.04 | Clarence Hickman #6 - The Hickman Piano Action, from James L. Brady |
| 1999.07.29.09 | Clarence Hickman #5 - The Model B Ampico, from James L. Brady |
| 1999.07.27.09 | Clarence Hickman #4 - Straightening Music Wire, from James L. Brady |
| 1999.07.26.06 | Clarence Hickman #3 - Importance of Inventions, from James L. Brady |
| 1999.07.23.05 | Clarence Hickman #2 - The Magnetic Tape Recorder, from James L. Brady |
| 1999.07.22.03 | Clarence Hickman and the Tape Recorder, from Craig Brougher |
| 1999.07.21.03 | Clarence Hickman #1 - On the Farm, from James L. Brady |
| 1999.07.21.02 | Clarence Hickman Letters, from James L. Brady |
| 1999.04.07.01 | Dr. Clarence N. Hickman & Mr. C. F. Stoddard, from James L. Brady |
| 1997.02.03.09 | Dr. Clarence Hickman, from Boris F. Kim |
| 1996.01.28.06 | Articles on Clarence Hickman, from Terry Smythe |
|
