S-Press Tape 13 (cassette)

John Cage talking on music and politics

John Cage talking to Hans G.Helms on music and politics (92 minutes)
An interview conducted and edited by Hans G.Helms

John Cage and Hans G.Helms, voice

ISBN 3-924215-26-X
2-track mono recording: April 7, 1972 in Cage's Apartment, 107 Bank Street, New York City during the production of the TV film Birdcage.
This is probably the same recording as Watershed Tapes C-402A
Previously released on tape-reels (in 1975), also as S-Press tape 27/29
Cassette released in 1975 (?)

Sources: Original cassette, University of California, Berkeley Music Library catalog, Harvard University Library catalog and S-Press website