PRINTED FORMS, PAPER, AND STATIONERY-NAMELY, CARD STOCK, PARCHMENT PAPER, TREATED PAPER FOR USE AS BACKING SHEETS IN TYPEWRITERS, PAPER FOR GENERAL STATIONERY AND DUPLICATING USE, AND BLANK LABELS, DUPLICATING UNITS FOR THE PREPARATION OF MASTER SHEETS FOR USE IN DUPLICATING MACHINES AND DUPLICATING PROCESSES, AND CARDS OR SHEETS ARRANGED IN OVERLAPPING RELATIONSHIP AT THEIR TOP AND BOTTOM EDGES AND DETACHABLY SECURED TOGETHER AT ONE OR BOTH OF THEIR SIDE EDGES