Decline and rise of Mesopotamian civilization: ethnoarchaeological perspective. Culture areas and integration spheresMaya lowlands. Migration corridors for Early man in North America. Fish utilization in riverine environments. Volcanic ash-tenprered pottery Lowland Maya. Maya Swasey Phase definition. Aztec marketing system Central place analysis. Turrialbapaleoindian quarry Costa Rica. Early watertable farming Coastal Peru. Largo-Galñlina towers. selectiuve utilization of animal species by humans.