Len Abbott: Sound (Sound)1964-06-24

Len Abbott: Sound Recordist (Sound)1971-08-12

Len Abbott: Sound Mixer (Sound)1971-03-01

Len Abbott: Sound Re-Recording Mixer (Sound)1975-11-07

Len Abbott: Sound Recordist (Sound)1963-03-26

Len Abbott: Sound Mixer (Sound)1971-10-01

Len Abbott: Sound Re-Recording Mixer (Sound)1965-07-15

Len Abbott: Sound Recordist (Sound)1962-04-18

Len Abbott: Sound (Sound)1976-01-01

Len Abbott: Sound Recordist (Sound)1964-03-10