| Author | Titles | 1.
| Colloques Internationaux du Centre National de la Recherche Scientifique, Paris, 1952 | 1 | 2.
| Colloquium of the Centre for the Study of the Portuguese Discoveries, 1�, Linacre, 1990 | 1 | 3.
| Colloquium on the History of Landscape Architecture, 13, Dumbarton Oaks (Washington), 1989 | 1 | 4.
| Collor, Fernando | 1 | 5.
| Collot, Michel | 1 | 6.
| Collovà, Roberto | 7 | 7.
| Collovini, Diego | 4 | 8.
| Colloway, Stephen | 1 | 9.
| Coll-Part, R. | 1 | 10.
| Collu, Cristiana | 1 |
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