File:Rudolf-carnap.jpg

Summary
Retrieved image from Wikipedia: http://it.wikipedia.org/wiki/Immagine:Carnap.jpg. The image is marked as public domain and no longer under copyright worldwide.

Additionally: This image is being used for identification of a deceased historic figure who is the subject of an article written for informational purposes. There is no known free alternative. It is believed that the use of the image on Wikipedia does not undermine the potential market for the sale or licensing of this image.