| 513140 |
Directory publishers (except exclusive Internet publishing) |
| 513140 |
Directory publishers and printing combined |
| 513140 |
Directory publishers, exclusively on Internet |
| 513140 |
Electronic directory publishers |
| 513140 |
Electronic directory publishers (except exclusive Internet publishing) |
| 513140 |
Electronic directory publishers, exclusively on Internet |
| 513140 |
Mailing list publishers |
| 513140 |
Mailing list publishers (except exclusive Internet publishing) |
| 513140 |
Publishers (except exclusive Internet publishing), directory |
| 513140 |
Publishers, directory |