Later Acheulian Marking Motifs I - Bilzingsleben, Germany / r)blzbdf1
"Figure 1. Marshack-style internal analysis of Artefact 3 [object 182.32] from Bilzingsleben. Note the five double lines made by a single tool: the superimposition sequence; andthe misalighment of the lines where they are intersected by desiccation cracks."
Illustration © Robert G. Bednarik. (1988). Comment on Mania, D. and Mania, U., Deliberate engravings on bone artefacts of Homo erectus. Rock Art Research 5,2:96-100. Figure 1.