| Author | Titles | | 1.
| M - Museum Leuven | 3 | | 2.
| M., N. | 24 | | 3.
| M., N. | 1 | | 4.
| M. Oliveres, Josep | 1 | | 5.
| M.***, pseud | 0 | | 6.
| Author is: Fleurieu, Charles Pierre Claret de, conde, 1738-1810 | 1 | | 7.
| M., R. | 1 | | 8.
| M., Ricardo Tiago | 0 | | 9.
| Author is: Moura, Ricardo Tiago, 1978- | 1 | | 10.
| M., S. | 1 | | 11.
| M. S. A. V | 0 | | 12.
| Author is: Vasconcelos, Matilde de Santana e, 1806-1893 | 1 | | 13.
| M S & R (Firma de Arquitectura) | 0 | | 14.
| Author is: Meyer, Scherer & Rockcastle (Firma de Arquitectura) | 1 |
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