File:Portret van professor Jan Konijnenburg, RP-P-BI-4172.jpg
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![File:Portret van professor Jan Konijnenburg, RP-P-BI-4172.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Portret_van_professor_Jan_Konijnenburg%2C_RP-P-BI-4172.jpg/451px-Portret_van_professor_Jan_Konijnenburg%2C_RP-P-BI-4172.jpg?20191224221747)
Size of this preview: 451 × 600 pixels. Other resolutions: 180 × 240 pixels | 361 × 480 pixels | 577 × 768 pixels | 770 × 1,024 pixels | 1,539 × 2,048 pixels | 4,202 × 5,590 pixels.
Original file (4,202 × 5,590 pixels, file size: 2.8 MB, MIME type: image/jpeg)