Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Jens Lorenz Franzen, Meike Köhler, and Salvador Moyà-Solà (Hrsg.), Courier Forschungsinstitut Senckenberg, CFS243 (2003): Walking Upright. Results of the 13th International Senckenberg Conference at the Werner Reimers Foundation, Bad Homburg vdH, and at the Senckenberg Research Institute, Frankfurt am Main, October 5–9, 1999, E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller), Stuttgart, ISBN 3-510-61357-0 (Euro 29, 90).