Intended to aid networking efforts among mental retardation professionals, parents, and persons with retardation, the directory lists international organizations and provides individual country reports on mental retardation efforts and organizations. Part I, international organizations, lists the United Nations and 5 of its specialized agencies, 3 inter-governmental (regional) organizations, 2 international coordinating agencies, and 25 international non-governmental organizations. Address, founding date, and a description are provided for each organization. The individual reports of 71 nations comprise most of the document. The following is presented for each nation: a brief description of the nation and its educational system; a listing of government agencies with mental retardation responsibility; information about voluntary organizations, research organizations, and publications; brief descriptive notes on programs and services; dates of school holiday periods; and sources of other information. (DB)