00442nam a2200157Ia 4500003000900000008004100009040001600050080001900066100002000085245005900105260003500164300001600199650002300215650002500238650002100263IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a621.316.8bDUM  aDummer, G. W. A 0aVariable resistors and potentiometerscG. W. A. Dummer  aLondonbSir Isaac Pitmanc1956  axiii, 176p.  a Potentiometers   a Resistors-Variable  aNASA Thesaurus