6 сент 2000 г. - Barter
Описание:
The city of Novus used a barter system in which the citizens traded goods. It was inefficient, however, because it was necessary for a double coincidence in each exchange.Добавлено на ленту времени:
Дата:
6 сент 2000 г.
Сейчас
~ 24 г назад