Berger, Lee R.; Keyser, André W.; Tobias, Phillip V. (1993). "Gladysvale: First early hominid site discovered in South Africa since 1948". American Journal of Physical Anthropology. 92 (1): 107–111. doi:10.1002/ajpa.1330920109. ISSN0002-9483. PMID8238287.
nih.gov
pubmed.ncbi.nlm.nih.gov
Berger, Lee R.; Keyser, André W.; Tobias, Phillip V. (1993). "Gladysvale: First early hominid site discovered in South Africa since 1948". American Journal of Physical Anthropology. 92 (1): 107–111. doi:10.1002/ajpa.1330920109. ISSN0002-9483. PMID8238287.
Berger, Lee R.; Keyser, André W.; Tobias, Phillip V. (1993). "Gladysvale: First early hominid site discovered in South Africa since 1948". American Journal of Physical Anthropology. 92 (1): 107–111. doi:10.1002/ajpa.1330920109. ISSN0002-9483. PMID8238287.