These people then converted the materials into products and exported them through local and regional exchange networks.

Inalienable possessions are nonetheless frequently drawn into exchange networks.

An exchange network in salt from coastal lagoons some 80 Km away had also been established by 30000 years ago.

Contacts made at the dog run have led to an exchange network.

Much of what is called a "complex" was more of an "exchange network."

The telephone services experienced a post-war boom for demand and it quickly became apparent that the existing exchange network was not sufficient.

The collection of periodicals which has been expanded through exchange networks, contains uninterrupted series that are among the oldest in the world.

Its aim was to create a social exchange network completely independent from political clubs and university institutions.

An entrepot for goods from Asia, Manila became the center of a valuable exchange network.

The points can also be used at up to 3,700 resorts in an international exchange network.