| Source | 1988-1989 | 1989-1990 | 1990-1991 | 1991-1992 |
| W3core | W3core_VIII | W3core_IX | W3core_X | |
| TMC1 | TMC1_VIII | |||
| Orion-IRC2 | OrionIRC2_VIII | |||
| IRC+10216 | IRC+10216_VIII | IRC+10216_X | ||
| L134N | L134N_IX | |||
| SGR-B2 | SGR-B2_VIII | SGR-B2_X | ||
| M17SW | M17SW_IX | M17SW_X | ||
| W51 | W51_VIII | W51_X | ||
| DR21 | DR21_VIII | DR21_X | ||
| NGC7027 | NGC7027_VIII | NGC7027_X | ||
| S140 | S140_VII | S140_VIII | S140_IX | S140_X |
| NGC7538 | NGC7538_VIII |