Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Game | Date | Opponent | Result | Cowboys points | Opponents | Record |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Sept. 17 | @ Arizona | Win | 13.0 | 0.0 | 1-0 |
| 2.0 | Sept. 24 | Air Force | Win | 23.0 | 6.0 | 2-0 |
| 3.0 | Oct. 1 | Colorado State | Win | 36.0 | 6.0 | 3-0 |
| 4.0 | Oct. 8 | Brigham Young | Win | 40.0 | 7.0 | 4-0 |
| 5.0 | Oct. 15 | @ Utah | Win | 37.0 | 7.0 | 5-0 |
| 6.0 | Oct. 22 | Wichita State | Win | 35.0 | 10.0 | 6-0 |
| 7.0 | Oct. 29 | @ Colorado State | Loss | 10.0 | 12.0 | 6-1 |
| 8.0 | Nov. 5 | @ San Jose State | Win | 55.0 | 0.0 | 7-1 |
| 9.0 | Nov. 12 | @ New Mexico | Win | 31.0 | 7.0 | 8-1 |
Question:
When did the Cowboys score 13 points in 1966?
Answer:
Sept. 17