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Science  01 Sep 1978:
Vol. 201, Issue 4358, pp. 807-809
DOI: 10.1126/science.201.4358.807

Article Information

vol. 201 no. 4358 807-809

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History: 
  • Received for publication February 3, 1978

Author Information

  1. THOMAS H. CHARLTON1,
  2. DAVID C. GROVE2,
  3. PHILIP K. HOPKE3
  1. 1Department of Anthropology, University of Iowa, Iowa City 52242
  2. 2Department of Anthropology, University of Illinois, Urbana 61801
  3. 3Institute for Environmental Studies, University of Illinois

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