| [INDEX REGARDING BACK CHANNEL MESSAGES - OCTOBER 1978, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - NOVEMBER 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - NOVEMBER 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - NOVEMBER 1978, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - MAY 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - MAY 1979, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - MARCH 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - MARCH 1979, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - JUNE 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - JUNE 1979, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - JULY 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - JULY 1979, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - JULY 1978, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - JULY 1978, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - JANUARY 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - FEBRUARY 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - DECEMBER 1979, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - AUGUST 1980, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - AUGUST 1979, WITH ATTACHMENT] |
|
| [INDEX REGARDING BACK CHANNEL MESSAGES - APRIL 1980, WITH ATTACHMENT] |
|