TY  - SER
AU  - Fowler, William R., 
TI  - Sources of obsidian from el mirador, guatemala : : New evidence on preclassic maya interation
T2  - American Anthropologist ; 
PY  - 1989///
CY  - Washington, DC : 
PB  - American Anthropological Association, 
N1  - Articulo dentro de research reports
ER  -