From the beginning of 80th of XX century steady growth of scientific interest to a problematics of inter-regional trade and economic cooperation was observed in connection with formation of state frontiers and frontier areas. It is caused by development of some global processes in which frontier territories take the central place. In particular. growing lib-eralization of world trade ... https://www.diegojavierfares.com/amazing-price-Kicker-48CDF104-Comp-10-Down-Firing-Loaded-Subwoofer-Enclosure-special-find/