[Washington, D.C. : Central Intelligence Agency], 1972
Relief shown by shading and spot heights. "500252 3-72." Includes comparative area map, location map, and subject maps of "Population and administrative divisions," "Economic activity, " and "Land utilization" in margins.
Land use—Bulgaria—Maps, Bulgaria—Maps, Bulgaria—Population—Maps, Bulgaria—Administrative and political divisions—Maps, and Bulgaria—Economic conditions—1944-1989—Maps