Encyclopedia of associations : an associations unlimited reference : a guide to more than 24,000 national and international organizations, including : trade, business, and commercial ; environmental and agricultural ; legal, governmental, public administration, and military ; engineering, technological, and natural and social sciences ; educational ; cultural ; social welfare ; health and medical ; public affairs ; fraternal, nationality, and ethnic ; religious ; veterans', hereditary, and patriotic ; hobby and avocational ; athletic and sports ; labor unions, associations, and federations ; chambers of commerce and trade and tourism ; Greek letter and related organizations ; and fan clubs. Volume 3, Supplement : an inter-edition reporting new associations and projects and important changes for groups listed in Volume 1, National Organizations of the U.S. /