Bulgaria-Assoc. of Tourism & Recreation 1 Lenin Square Sofia, Bulgaria +359-2-84-131;;; //www.cs.columbia.edu/~radev/bulginfo.html Bulgaria (Germany) Balkantourist Stefan St 1-3 6000 Frankfurt am Main +49-69-295-2846 Bulgaria (USA) Balkantourist 161 E 86th New York, NY 10028 +1-212-722-1110