| Author | Titles | | 1.
| Pipa, Álvaro, ?-1938 | 1 | | 2.
| Pipa, Veronique | 1 | | 3.
| Piper, Adrian, 1948- | 3 | | 4.
| Piper, Adrian Margaret Smith, 1948- | 0 | | 5.
| Author is: Piper, Adrian, 1948- | 3 | | 6.
| Piper, David | 3 | | 7.
| Piper, David Warren | 1 | | 8.
| Piper, John, 1903-1992 | 3 | | 9.
| Piper, John Egerton Christmas, 1903-1992 | 0 | | 10.
| Author is: Piper, John, 1903-1992 | 3 | | 11.
| Piper, Keith, 19--?- | 1 | | 12.
| Piper, Myfanwy | 1 |
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