Reprocessed Lunar Orbiter 4 image cropped in Gimp to show Kirch crater and surrounding terrain. The original image is in the public domain because it is a work of the U.S. Government (NASA).
Immediate source: Lunar and Planetary Institute, Lunar Orbiter Photo Gallery Lunar Orbiter 4, image 115, h2 [1]
{{Information |Description = [[Kirch (crater)]], on the moon. |Source = Reprocessed [[Lunar Orbiter 4]] image cropped in Gimp to show Kirch crater and surrounding terrain. The original image is in the public domain because it is a work of the U.S. Gov...