(7878) PETROV, C, [in transliteration stated as 1973. V’rhu biologiyata i ekologiyata na pcheloyada (Merops apiaster L.) v Plovdivsko. —On the biology and ecology of the bee-eater (Merops apiaster L.) in the Plovdiv region, /zv. prir. Muz. Plov 11: 65-88. (Bulg., with Engl. & Germ. s’s). — (Author’s current address unknown). 13 identified Zygopt. spp. are listed among the food items utilized.