Excavations in the Southern Sudan, 1979

REFERENCES

• Butzer , K. W. , Isaac , G. LI. , Richardson , J. L. and Washbourn-Kamau , C. 1972 . Radiocarbon dating of East African lake levels . Science , 175 : 1069 – 76 .
   PubMed Web of Science ®Google Scholar
• Clark , R. M. 1975 . A calibration curve for radiocarbon dates . Antiquity , 49 ( 196 ) : 251 – 67 .
   Web of Science ®Google Scholar
• David , N. “ The BIEA Southern Sudan expedition of 1979: interpretation of the archaeological data ” . In Culture History in The Southern Sudan Edited by: Mack , B. J. and Robertshaw , P. T. Nairobi : BIEA . in press
   Google Scholar
• David , N. “ Prehistory and historical linguistics in Central Africa: points of contact ” . In Linguistics and Archaeology in African History Edited by: Ehret , C. and Posnansky , M. Berkeley : University of California Press . in press b. to appear
   Google Scholar
• David N. n.d. ‘Rop rock shelter: a reassessment’.
   Google Scholar
• David , N. and Vidal , P. 1977 . The Nana-Modè village site and the prehistory of the Ubangian-speaking peoples . W.Afr.J. Archaeol , 7 : 17 – 56 .
   Google Scholar
• Ehret , C. “ The Southern Sudan 3000 BC to AD 1000: a preliminary linguistic overview of population movement and culture contact ” . In Culture History in The Southern Sudan Edited by: Mack , B. J. and Robertshaw , P. T. Nairobi : BIEA . in press
   Google Scholar
• Fagg , B. E. 1972 . Rop rock shelter excavations 1944 . W.Afr. J. Archaeol. , 2 : 1 – 12 .
   Web of Science ®Google Scholar
• Phillipson D.W. 1981 ‘The British archaeological expedition to the Southern Sudan: preliminary report,’ pp. 1–6, this volume.
   Google Scholar
• Robertshaw , P. T. “ Eastern Equatoria in the context of later Eastern African prehistory ” . In Culture History in the Southern Sudan Edited by: Mack , B. J. and Robertshaw , P. T. Nairobi : BIEA . in press
   Google Scholar
• Rosenfeld , A. 1972 . The microlithic industries of Rop rock shelter . W. Afr. J. Archaeol , 2 : 17 – 28 .
   Web of Science ®Google Scholar
• Street , F. A. and Grove , A. T. 1976 . Environmental and climatic implications of late quaternary lake-level fluctuations in Africa . Nature , 261 : 385 – 90 .
   Web of Science ®Google Scholar
• Titherington , G. W. 1923 . City mounds in the Bahr el Ghazal province . SNR , 6 : 111 – 112 .
   Google Scholar
• White , J. P. and Thomas , D. H. 1972 . “ What mean these stones? Ethno-taxonomic models and archaeological interpretations in the New Guinea Highlands ” . In Models in Archaeology Edited by: Clarke , D. L. 275 – 308 . London : Methuen .
   Google Scholar
• Whiteman , A. J. 1971 . The Geology of the Sudan Republic Oxford University Press .
   Google Scholar
• Wickens , G. E. 1975 . Changes in the climate and environment of the Sudan since 20,000 BP . Boisseria , 24 : 43 – 65 .
   Google Scholar