| Author | Titles | | 1.
| Long, Richard, 1945- | 19 | | 2.
| Long, Robert Ballard | 1 | | 3.
| Long & Ryle Art International, London | 1 | | 4.
| Long, William J., 1867-1952 | 2 | | 5.
| Long, William Joseph, 1867-1952 | 0 | | 6.
| Author is: Long, William J., 1867-1952 | 2 | | 7.
| Longa, Jorge | 1 | | 8.
| Longagnani, Laureta | 1 | | 9.
| Longanesi, Caterina | 1 | | 10.
| Longaretti, Trento | 4 | | 11.
| Longari, Elisabetta | 5 |
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