Over 5,000 entries arranged in four parts. Part I comprises reference and general works to provide a guide to information on Southeast Asia. Part II provides the setting of space and time. Part III features the people and Part IV the many facets of culture and society — language; ideas, beliefs, values; institutions; creative expression; and social and cultural change. Within each section, the arrangement is geographical, beginning with Southeast Asia as a whole followed by the various countries in alphabetical order.

Covers the history of Thailand, Thai Buddhism, economics, politics, population, customs and values, and cultural events

1970- issued in 2 vols.: v. 1, General reference, social sciences, history, economics, business; v. 2, Fine arts, humanities, science and engineering.