Organization of American StatesThe Organization of American States (, , ), or the OAS or OEA, is a continental organization that was founded on 30 April 1948, for the purposes of solidarity and cooperation among its member states within the Western Hemisphere. During the Cold War, the United States hoped the OAS would be a bulwark against the spread of communism. Since the 1990s, the organization has focused on election monitoring. Headquartered in the United States' capital Washington, D.C., the OAS's members are the 35 independent states of the Americas.
As of 26 May 2015, the Secretary General of OAS is Luis Almagro. Provided by Wikipedia
Introducción al estudio de los productos naturales : una introduccion destinada a profesores de enseñanza media /
by Brieux, Jorge A.“...Organización de los Estados Americanos....”