This report is intented to provide technical information needed in the development of prehistoric contexts for southwestern Colorado (specifically, the southern part of the upper Colorado River drainage in Colorado). "Prehistoric" means prior to the regular production of written documents in the study area - approximately A.D. 1850

The peoples of the American Southwest during the 13th through the 17th centuries witnessed dramatic changes in settlement size, exchange relationships, ideology, social organization, and migrations that included those of the first European settlers. Concomitant with these world-shaking events, communities of potters began producing new kinds of wares—particularly polychrome and glaze-paint decorated pottery—that entailed new technologies and new materials. The contributors to this volume present results of their collaborative research into the production and distribution of these new wares, including cutting-edge chemical and petrographic analyses. They use the insights gained to reflect on the changing nature of communities of potters as they participated in the dynamic social conditions of their world.

Rangelands comprise between 40 and 50 percent of all U.S. land and serve the nation both as productive areas for wildlife, recreational use, and livestock grazing and as watersheds. The health and management of rangelands have been matters for scientific inquiry and public debate since the 1880s, when reports of widespread range degradation and livestock losses led to the first attempts to inventory and classify rangelands. Scientists are now questioning the utility of current methods of rangeland classification and inventory, as well as the data available to determine whether rangelands are being degraded. These experts, who are using the same methods and data, have come to different conclusions. This book examines the scientific basis of methods used by federal agencies to inventory, classify, and monitor rangelands; it assesses the success of these methods; and it recommends improvements. The book's findings and recommendations are of interest to the public; scientists; ranchers; and local, state, and federal policymakers.

In light of the enormous interest in building intelligent systems, this volume blends theory, applications, and methodology of cybernetics taking it out of the realm of the abstract and explaining how cybernetics can contribute to an improved understanding of intelligence. Among the topics of the 17

This book contains descriptions and color illustrations of 220 prehistoric southwest pottery types and 40 waves