Based on the work originally presented as the 1st named author's thesis (Ph.D)--University of London, Institute of Archaeology, 2000.
Intra-site obsidian distribution and consumption patterns in Northern Belize and the North-Eastern Peten by Helen R. Haines. ISBN 9781407309095. Published by Archaeopress in 2012. Publication and catalogue information, links to buy online and reader comments.