| Author | Titles | | 1.
| Powell, Cecilia | 4 | | 2.
| Powell, Dilys | 3 | | 3.
| Powell, Earl A. | 3 | | 4.
| Powell, Earl N. | 2 | | 5.
| Powell, Edgar, pseud. | 0 | | 6.
| Author is: Amorim, António Guedes de, 1901-1979 | 24 | | 7.
| Powell, Edward Alexander | 1 | | 8.
| Powell, F. York, 1850-1904 | 1 | | 9.
| Powell, G. | 1 | | 10.
| Powell, Helen | 1 | | 11.
| Powell, Ivor | 1 |
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