References
- Ball, Joseph W. and Irwin Rovner and Irwin Rovner 1972 Protohistoric Putun Trade Patterns: Evidence from Two Graves at Atasta, Campeche, Mexico. Katunob Vol. VIII, No. 2.
- Hay, Conrad A., and Robert Rogers and Robert Rogers 1978 A Method for Determining Polyhedral Core Size from Prismatic Blade Debitage. Lithic Technology, Vol. VII, No. 3.
- Rovner, Irwin 1976 A Method for Determining Obsidian Trade Patterns in the Maya Lowlands. Katunob, Vol. IX, No. 1.