Croatian ethnomusicologist Dr Vinko Zganec wrote "The clarinet was as effective an accompaniment to the large drum in the folk dance from Kozjak as it was to the small drum in the folk dance "Teškoto" from Nižopole (Bitola). They provided a very effective combination." This appeared in an article entitled "Yugoslav Musical folklore at the Festival in Opatija". Yugoslav Folk Music Festival had been especially arranged by "Unions of Societies for Culture and Education of Yugoslavia" for the members of the Conference of The International Folk Music Council (IFMC) to studying folk music tradition and beauty and variety of Yugoslav folk art of 85 folk dance groups from Serbia, Bosnia and Herzegovina, Montenegro, Slovenia, Macedonia and Croatia which participated at this festival. "Every evening, for three hours or more, we witnessed an astonishing pageant of costume and custom, ritual and social dance, song and instrumental playing by 700 performers brought together from every part of the country. This was a world whose riches most of us had barely guessed at and, in this highly concentrated presentation, it was an overwhelming and unforgettable experience," written by Marie Slocombe and appeared in an article entitled, "Some Impression of the Yugoslav Conference and Festival " published by The International Folk Music Council". (IFMC)