Links to several research projects and concerns in respect to the Twyfelfontein rock art.
Images of rock art on the Hoog Genoeg Farm near Omaruru.
A survey into the relationship between animal-engravings and cupules, by Maarten van Hoek
TRACCE Online Rock Art Bulletin paper on Namibian engravings and interpretation.
General overview and information on location, meaning and protection of rock art.
Photo gallery of Twyfelfontein rock engravings.