| 513130 |
Nonfiction book publishers |
| 513130 |
Nonfiction book publishers (except exclusive Internet publishing) |
| 513130 |
Nonfiction book publishers and printing combined |
| 513130 |
Nonfiction book publishers, exclusively on Internet |
| 513130 |
Pamphlet publishers |
| 513130 |
Pamphlet publishers (except exclusive Internet publishing) |
| 513130 |
Pamphlet publishers and printing combined |
| 513130 |
Pamphlet publishers, exclusively on Internet |
| 513130 |
Professional book publishers |
| 513130 |
Professional book publishers (except exclusive Internet publishing) |