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- [21] 3RD INTERNATIONAL MEETING ON SURFACE TREATMENTS CORROSION TRAITEMENTS PROTECTION FINITION, 1973, 21 (03): : 153 - 154
- [24] 3RD MEETING OF CENTRAL EXECUTIVE COMMITTEE OF TRADE UNIONS GRAPHIC ARTS AND PAPER SECTION ZELLSTOFF UND PAPIER, 1972, 21 (12): : 355 - 355