Amazon | Compact Cassette Report - Philips One-Hole Cassette vs. Compact Cassette Norelco Philips: ... and the winner is... | Sueltz, Uwe H | History of Technology
My collection of 1970's Philips compact cassettes | Stereo2Go forums
Philips EL 3302 | Compact cassette, Tape recorder, Philips
Blank Cassettes: Audio - Philips - No Sort - C - 60 - Netherlands (1966)
Blank Cassettes: Audio - Philips - Low Noise - C - 60 - Austria (1971)
File:Philips C-60 - Tape - Worn - Face (13844721854).jpg - Wikipedia