{"id":"000503117","type":"article","title":"Research on mineral mortar used in ancient times. Results of studies on mortar used at the construction of Roman aqueducts in the territory of Bulgaria. (Poln.m.engl.Res.) -","pages":"106-111","container-title":"Archeologia. Rocznik Instytutu archeologii i etnologii Polskiej akademii nauk, 21.1970","author":[{"family":"Biernacka-Lubańska","given":"M."}],"issued":{"raw":"1970"}}