Philosophers, writers and scientists, from cell biologists to ecologists, have long recognized the special nature of boundaries and interface areas of all kinds. Among ecologists in particular, there has been an upsurge in interest in the sensitive boundary areas of interaction between ecosystems, which are called 'ecotones' and which are often characterized by higher biological diversity than adjacent areas.

The Upper Mantaro Archaeological Research Project is a benchmark for a new level of quality in Andean archaeological research. This volume continues to develop UMARP approaches to understanding prehistoric Andean economy and polity. --

The nature of power and political diversity is examined in the Andean region of central Peru.

A study dealing with the nature, production, nutritive value and storage of the potato, and with its quality both as a foodstuff and as the raw material for an important processing industry. The emphasis is on principles rather than practice.