Barag, D. "The countermarks of the Legio Decima Fretensis" in A. Kindler, ed., The patterns of monetary development in Phoenicia and Palestine in antiquity [International Numismatic Convention, Jerusalem, 27-31 December, 1963, Proceedings]. (Tel-Aviv, 1967).
Also see:
Barag and Qedar
Barag and Qedar Beginning
Barag Candlestick
Barag Lead
Barag Hanita