ELEKTRONI founded in 1961, in Karlovac, Croatia (ex-Yugoslavia) by Jurica Grosinger (lead guitar and singer). This EP they recorded in 1968 for Record Company "Jugoton". Other members of the band were Vatroslav Slavnić (bass guitar and songwriter), Boris Borošić (rhythm guitar) and Mario Janjac (drums).
JUTARNJEZVIJEZDE were established in 1962, in Zagreb (Croatia). They played mostly the repertoire of world famous artists such as Pat Boone, Vince Taylor, Shadows, Hurricanes, etc. Members of the group were Drago Mlinarec (vocal, rhythm guitar), Mišo Tatalović (bass), Goran Ivas (lead guitar), Ivica Stanković (lead guitar), Dražen Glasnović (piano) and Nenad Šarić (drums). They recorded a few songs for Radio Zagreb and they broke up in 1966.
VISPLAVI were from Beograd, Serbia (ex-Yugoslavia). Members were Miroslav Jankov (guitar), Petrač Vučković (keyboards), Marek Pawlak (vocal, guitar, bass), Dragan Aranđelović (saxophone), Laszlo Steiner (saxophone), Zoran Jurkić (flute, saxophone), Dušan Mijić (bass), Novica Novović (drums) and Bodi Nov (drums).