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Archival Status
U.S. Dept. of Commerce, Patent and Trademark Office : U.S. G.P.O.
HathiTrust
998-2000 PT.1; 998-2000 PT.2; v.1
U.S. Dept. of Commerce, Patent and Trademark Office.
1979 (4); 1983 pt.1 (5); 1983 pt.2 (5); 1997 pt.1 (6); 1997 pt.2 (6); 1998 pt.2 (7); 1998 pt.1 (7)