When did trade centers begin to appear in eastern africa?

When does a metropolitan area become a megalopolis?

Halle is a calculating, self-centered salesperson. she never engages in relationship marketing. she looks on any sales situation as a "win-lose" situation, and she believes any legal method she can use is justified when she wins. hallie is most likely at the stage of ethical development.

In the construction of a new housing development which factor of production can be categorized as land?