1.
20 Bit + Sign, Relay Switched d/a Converter (Classic Reprint)
by Souders, T. Michael
ISBN: 9780260962096
List Price: $7.97
2.
20 Bit + Sign, Relay Switched d/a Converter (Classic Reprint)
by Souders, T. Michael
ISBN: 9780331359343
List Price: $24.49