Cosmonauts:
    Pyotr I. Klimuk [2], Commander
    Vitali I. Sevastyanov [2], Flight Engineer
Backup:
    Vladimir Kovalyonok
    Y. Ponomaryov
Launch:
    Date: 24 May 1975
    Time: 14:58 UTC
Landing:
    Date: 26 July 1975
    Time: 14:18 UTC
Duration: 62 days, 23 hours, 20 minutes
Call Sign: Kavkaz (Caucasus)

The cosmonauts worked in the Salyut 4 space station.

(click to enlarge)