| Author | Titles | | 1.
| Longhi, Roberto, 1890-1970 | 9 | | 2.
| Related author: Fondazione di Studi di Storia dell'Arte Roberto Longhi (Florença, Itália) | 2 | | 3.
| Longhi, Stefano, 19--?- | 1 | | 4.
| Longhorn, Sheila M. | 1 | | 5.
| Longhurst, John E. | 1 | | 6.
| Longhurst, Margaret H. | 2 | | 7.
| Longhurst, Margaret Helen | 0 | | 8.
| Author is: Longhurst, Margaret H. | 2 | | 9.
| Longi, Roberto, 1890-1970 | 0 | | 10.
| Author is: Longhi, Roberto, 1890-1970 | 9 | | 11.
| Longland, Jean R. | 8 | | 12.
| Longley, Alys | 2 | | 13.
| Longmore, J., 1926- | 2 |
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