| HA |
| Name | Number of records |
| Hachette | 2948 |
| Hackett Publishing Company, Inc. | 912 |
| Haines & Company, Inc. | 2429 |
| Hall-Clement Publications | 1539 |
| Hall-Clement Publications. | 1538 |
| Hal Leonard Corporation | 2854 |
| Hal Leonard Publishing Corporation | 2946 |
| Hallmark Cards, Inc. | 596 |
| Hallmark Entertainment Distribution Company. | 394 |
| Hallmark Entertainment Distribution, LLC | 462 |
| Hallmark Entertainment Distribution, LLC. | 860 |
| Hallmark Entertainment Productions, LLC | 218 |
| Hamdon Entertainment | 127 |
| Hampshire House Publishing Corporation | 89 |
| Hampton-Brown Company, Inc. | 790 |
| Hamstein Cumberland Music | 3357 |
| Hamstein Stroudavarious Music | 395 |
| Hanley & Belfus, Inc. | 472 |
| Hanna-Barbera Cartoons, Inc. | 678 |
| Hanna-Barbera Productions, Inc. | 4273 |
| Happenstance, Ltd. | 126 |
| Harcourt Achieve, Inc. | 907 |
| Harcourt Assessment, Inc. | 295 |
| Harcourt Brace & Company | 5529 |
| Harcourt, Brace & Company | 441 |
| Harcourt Brace Jovanovich, Inc. | 10690 |
| Harcourt Brace Jovanovich Legal and Professional Publications, Inc. | 1220 |
| Harcourt Brace Legal and Professional Publications, Inc. | 927 |
| Harcourt, Inc. | 4475 |
| Harcourt Learning Direct Publications, Inc. | 549 |
| Hardtail Hits | 247 |
| Hardware Distribution, Inc. | 594 |
| Harlan Davidson, Inc. | 211 |
| Harlem Music | 74 |
| Harlequin Enterprises, Ltd. | 328 |
| Harms, Inc. | 546 |
| Harold Flammer, Inc. | 1118 |
| HarperCollins College Publishers | 448 |
| HarperCollins Publishers, Inc. | 779 |
| Harper & Row Publishers, Inc. | 197 |
| Harper & Row, Publishers, Inc. | 2775 |
| Harrick Music, Inc. | 116 |
| Harrindur Publishing Company | 248 |
| Harrison Company | 4286 |
| Harry N. Abrams, Inc. | 854 |
| Harry VonTilzer Music Publishing Company | 164 |
| Harvard University. President and Fellows of Harvard College | 6817 |
| Harvard University. President and Fellows of Harvard College. | 215 |
| Harvest House Publishers | 777 |
| Hasbro, Inc. | 1001 |
| Hat Band Music | 170 |
| Hawkes & Son (London) Ltd. | 209 |
| Haworth Press, Inc. | 1019 |
| Hayden Book Company, Inc. | 298 |
| Hayes School Publishing Company, Inc. | 722 |
| Hayes Street Music, Inc. | 144 |
| Haynes North America, Inc. | 679 |
| Haynes Publishing | 331 |
| Hazelden Foundation | 1207 |
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