Cultural relations between Greeks and Bulgarians from the middle of the XVth to the middle of the XIXth c. : 1. Greek-Bulgarian symposium organized in Thessaloniki (22-25 September 1978) by the "Institute for Balkan studies" in Thessaloniki and the "Institut za balkanistika pri BAN" in Sofia = Pneumatikes kai politistikes scheseis Hellēnōn kai Boulgarōn apo ta mesa tou 15 heōs ta mesa tou 19 aiōna : 1. Hellēnoboulgariko symposio ... = Kulturni i literaturni otnošenija meždu gǎrci i bǎlgari ot sredata na XV do sredata na XIX vek : 1. Grăcko-bălgarski simpozium ...