site.btaMarch 15, 1970: Bulgaria Opens Pavilion at Expo '70 in Osaka
Postage stamps issued on the occasion of Expo '70 in Osaka, July 21, 1970 (BTA Photo/Evgenia Malezanova)
Bulgaria opened its pavilion at Expo '70 in Osaka, Japan, on March 15, 1970. Throughout the 183 days of the world fair, the pavilion drew more than nine million visitors.
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