Book Chapter Which obsidian is worth it?

Citation: Torrence R; Specht J; Fullagar, R; Summerhayes G.. 1996. Which obsidian is worth it?. J. M. Davidson, G. Irwin, B. F. Leach, A. Pawley and D. Brown (ed). pp 211-224 In Oceanic Culture History: Essays in Honour of Roger Green. New Zealand Journal of Archaeology Special Publication. N/A: Dunedin.

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