Note: Yes, this is the same performance & master source as most of the material on Dub Room Special (CD). It is an entirely different mix.
[...] Stereo Mixes Produced by FZ, Paramount Studios, Hollywood, September 1974 with Kerry McNabb, Re-Mix Engineer
Conceptual Continuum & minutiae by gz
Design Layout for Zappa Records by Keith Lawler
Ticket design by Cal Schenkel for NT&B, 1974
Photographs & Screengrabs by John Williams
All Assets: ZFT Vault Archives
Production Manager, Melanie Starks
Joe Travers, Vaultmeisterment & Transfers, UMRK, 2010
Mastered by Bob Ludwig, Gateway Mastering, 2009
Source: 1974 Stereo Analog Master. Mastered by Bob Ludwig, Gateway Mastering. Official Release #97.
Research, compilation and maintenance by Román García Albertos