Columbia subject headings:
Harvard subject headings:
Eaton, John, 1935---Correspondence.
Electronic musical instruments.
Ketoff, Paolo--Correspondence.
Ketoff, Paolo.
Musical instrument makers--Italy--Correspondence.
Musicians--Correspondence
Synthesizer (Musical instrument)
Princeton subject headings:
Eaton, John, 1935-2015--Correspondence.
Electronic musical instruments.
Ketoff, Paolo--Correspondence.
Ketoff, Paolo.
Musical instrument makers--Italy--Correspondence.
Musicians--Correspondence.
Synthesizer (Musical instrument)