| Author | Titles | | 1.
| Popp, Susanne | 1 | | 2.
| Poppa, Lorenzo di | 1 | | 3.
| Poppe, António, 1968- | 9 | | 4.
| Poppe, António Ricardo S. | 1 | | 5.
| Poppe, Elias Sebastião, Activ.1756 | 1 | | 6.
| Poppe, Manuel, 1938- | 18 | | 7.
| Poppelsdorff, Robin | 1 | | 8.
| Popper, F., 1918- | 0 | | 9.
| Author is: Popper, Frank, 1918- | 9 | | 10.
| Popper, Frank, 1918- | 9 | | 11.
| Popper, Karl R. | 1 |
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