The discs have an individual Catalog Number:
Disc 1 (originally released in 1966): 779 199-1
Disc 2 (originally released in 1967): 779 199-2
Disc 3 (originally released in 1967): 779 199-3
Disc 4 (originally released in 1968): 779 199-8
Disc 5 (originally released in 1968): 779 200-4
Disc 6: 779 197-8

Disc 6:
Tracks 1+2 from [m=1568123]
Tracks 3+4 from [m=1351649]
Tracks 5+6 from [m=621405]
Track 7+8 from [r=5150750]
Track 9 from [r=5197328]
Tracks 10+11 from [m=665694]
Tracks 12+13 from [m=672848]
Tracks 14+15 from [r=5197342]
Tracks 16 to 19 from [r=2223968]