By Park Chul   Helm Richard F   Novak John T   in Water Environment Research

ISSN:1554-7531|80|12|2219-2227

Water Environment Federation‎(2008)‎

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By Boivin Nicole   Crowther Alison   Helm Richard   Fuller Dorian   in Journal of World Prehistory

ISSN:0892-7537|26|3|213-281

Springer Publishing Company ‎(2013)‎

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