In this volume, archaeologist Jeffrey R. Parsons presents research based on an extensive 1967 survey of the Texcoco Region in the Valley of Mexico. The sites are organized by time period, from Middle Formative to Aztec. Parsons describes the sites in detail and compares them to those of the same time periods in the Teotihuacan Valley and the Valley of Mexico in general.

Subsistence intensification, innovation and change have long figured prominently in explanations for the development of social complexity among foragers and horticulturalists. This set of global case studies re-examines the ‘subsistence question’ in light of recent research. It contrasts traditional approaches with recent archaeological research that presents human driven strategies for power, prestige, and status as causes of subsistence intensification.

Beginning with 1953, entries for Motion pictures and filmstrips, Music and phonorecords form separate parts of the Library of Congress catalogue. Entries for Maps and atlases were issued separately 1953-1955.

Its outstanding feature is the inclusion of journal articles. For more than 50 years the periodicals have been indexed, as well as compilations such as Festschriften, and the proceedings of congresses.