{"id":"000537463","type":"article","title":"Complex physical geographic study of the region of the town of Isperih, with elements of paleolandscape reconstruction. (Bulg.m.engl.Res.) -","pages":"192-196","container-title":"Acta, 4.1990","author":[{"family":"Petrov","given":"P."}],"issued":{"raw":"1990"}}