| Author | Titles | | 1.
| Grácio, Rui Alexandre | 2 | | 2.
| Grácio, Vasco | 3 | | 3.
| Graciotti, Mário | 2 | | 4.
| Gracyk, Theodore A. | 1 | | 5.
| Grad, A.-D. | 1 | | 6.
| Grade, Eugénio Dionísio Mascarenhas, Visconde de Lagoa | 1 | | 7.
| Grade, Fernando, 1943- | 35 | | 8.
| Grade, José | 1 | | 9.
| Gradi, Marco | 1 | | 10.
| Gradidge, Roderick | 1 |
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