au.\*:("SAPOUNOV IG")
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ON THE AGE OF THE IRON ORES OF THE PONOR-GRADETS JURASSIC STRIP (WESTERN BALKAN RANGE).SAPOUNOV IG.1969; C.R. ACAD. BULG. SCI.; BGR; 1969, VOL. 22, NUM. 0007, P. 807 A 810Miscellaneous