- Armstrong Super-Regenerative Circuit Book -1922A 3041 visits
- Clapp-Eastham Receivers -1922A 2193 visits
- Good Housekeeping 1938-01 2453 visits
- Good Housekeeping 1938-02 2211 visits
- Good Housekeeping 1938-07 2919 visits
- Scientific American 1891-04-04 1782 visits
- Scientific American 1891-04-18 1840 visits
- Scientific American 1902-12-27 1468 visits