http://hdl.handle.net/123456789/2723 Sun, 05 Apr 2026 15:42:12 GMT 2026-04-05T15:42:12Z http://hdl.handle.net/123456789/2823 ENCYCLOPEDIA OF ELECTRONIC CIRCUITS RUDOLF F GRAF Sat, 01 Jan 1938 00:00:00 GMT http://hdl.handle.net/123456789/2823 1938-01-01T00:00:00Z http://hdl.handle.net/123456789/2779 ENCYCLOPEDIA OF ELECTRONIC CIRCUITS RUDOLF F GRAF, WILLIAM SHEETS Sun, 01 Jan 1995 00:00:00 GMT http://hdl.handle.net/123456789/2779 1995-01-01T00:00:00Z