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| Characteristic signature of Piet de Jong from the watercolors in the Athenian Agora, type 2c ... Craig Mauzy ... PD 242 Horizontal (normal) ... 2006 ... type 2c. |
| Characteristic signature of Piet de Jong from the watercolors in the Athenian Agora, type 2c ... Craig Mauzy ... Ptg. 82 Horizontal (normal) ... 2006 ... type 2c. |
| Characteristic signature of Piet de Jong from the watercolors in the Athenian Agora, type 2d ... Ptg. 846 Horizontal (normal) ... 2006 ... Papadopoulos (2007c), p. 301, fig. 237a. |
| Characteristic signature of Piet de Jong from the watercolors in the Athenian Agora, type 1 ... Craig Mauzy ... Ptg. 67 Horizontal (normal) ... 2006 ... Papadopoulos (2007c), p. 301, fig. 237a. |
| Characteristic signature of Piet de Jong from the watercolors in the Athenian Agora, type 1 ... Craig Mauzy ... Ptg. 65 Horizontal (normal) ... 2006 ... Papadopoulos (2007c), p. 301, fig. 237a. |
| Characteristic signature of Piet de Jong from the watercolors in the Athenian Agora, type 1 ... Craig Mauzy ... Ptg. 334 Horizontal (normal) ... 2006 ... Papadopoulos (2007c), p. 301, fig. 237a. |
| Characteristic signature of Piet de Jong from the watercolors in the Athenian Agora, type 2a ... Craig Mauzy ... Ptg. 147 Horizontal (normal) ... 2006 ... Papadopoulos (2007c), p. 301, fig. 237a. |
| Characteristic signature of Piet de Jong from the watercolors in the Athenian Agora, type 2a ... Craig Mauzy ... Ptg. 224 Horizontal (normal) ... 2006 ... Papadopoulos (2007c), p. 301, fig. 237a. |
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