1. Barrett , S. A. Gifford , E. W. 1933 2 4 117 376)
2. Bartelink , E. J. 2001
3. Bartelink , E. J. 2006
4. Resource intensification among hunter-gatherers: Acorn economies in prehistoric California;Basgall;Research in Economic Anthropology,1987
5. Basgall , M. E. Hildebrandt , W. R. 1989