Index: /trunk/CONTRIBUTION
===================================================================
--- /trunk/CONTRIBUTION	(revision 16350)
+++ /trunk/CONTRIBUTION	(revision 16351)
@@ -106,6 +106,12 @@
 ------------------------------------ ICONS ------------------------------------
 
-Most icons have been nicked from GNOME and the GIMP, both under GPL. 
-Some are originally LGPL but redistributed here under GPL. 
+Lots of icons are from GNOME Project https://www.gnome.org/ under GPL or LGPL,
+redistributed here under GPL.
+
+Some icons are from GIMP https://www.gimp.org/ under GPL or LGPL,
+redistributed here under GPL.
+
+Lots of icons are from https://openclipart.org/, https://publicdomainvectors.org/,
+The Tango Desktop Project, other sources or self created, all PD and CC0 licensed.
 
 Simple OpenStreetMap logo has been created by ScubbX (CC-SA 2.0) based on official
@@ -115,5 +121,5 @@
 Social logos come from https://github.com/Automattic/social-logos (GPLv2 or later)
 
-The keyboard icon comes fom:
+The keyboard icon comes from:
 - source: http://www.iconfinder.net/index.php?q=key&page=icondetails&iconid=8553&size=128&q=key&s12=on&s16=on&s22=on&s32=on&s48=on&s64=on&s128=on
 - licence: GPL
@@ -122,2 +128,5 @@
 - original size: 128x128
 - modifications: icon was cropped, then resized
+
+See also the commit message of each icon for its source
+(https://josm.openstreetmap.de/browser/josm/trunk/resources/images).