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+Here's the file to list the authors of the pictures, as
+far as I (matju) know:
+
+b001.jpg, r001.jpg:
+  Eyewire Catalogue, 1999 or before. It should be checked
+  whether there still exists a copyright on this, because
+  the original provider has disappeared (bankruptcy??)
+  several years ago.
+
+g001.jpg:
+  by Alexandre Castonguay, 1999 (?).
+
+bluemarble.jpg:
+  NASA (?)
+
+lada.jpg:
+  hungarian newspaper ad.
+
+lena.jpg:
+  Lena Sjööblom Soderberg, centerfold of Playboy 1972.11.
+  Researchers in infographics have extensively used that
+  picture without necessarily asking for copyright, and
+  apparently Playboy doesn't mind.
+
+lucida-typewriter-12.grid.gz:
+  a grid(256,13,7) containing the Lucida Typewriter 12
+  medium font.
+
+opensource.png:
+  modification of a World War Two poster. Both authors
+  (original's and spoof's) are unknown to me. Should check.
+
+rose.jpg:
+  unknown origin.
+
+ruby0216.jpg:
+  photo from a conference about the Ruby programming language,
+  held somewhere in Japan in 2003 or so. (?)
+
+teapot.png:
+  Researchers in infographics have also extensively used
+  that picture (actually the wireframe model). This is
+  (afaik) the original model, produced in the 1970's (?)
+  by one such researcher, and then was rendered in the
+  1990's using the Povray raytracer, and then bundled as
+  teapot.ppm in Tcl/Tk, and finally in 2001 I grabbed
+  that picture 
+
+test.mpeg:
+  unknown origin. Too small to be copyrightable.
+
+tux.tga.gz:
+  unknown origin.