00785cam a22002292  45000010008000000030008000080050017000160080041000330100017000740400019000910500023001100820017001331000049001502450133001992600032003323000029003645000020003936500018004136500045004316500021004767000058004977006182BD-DhUL20150114181009.0830714s1957    enka          000 0 eng    a   58001294   aDLCcCarPdDLC00aQC544.V3bB4 1957a  aBD-DhULbBEU1 aBenham, Wilfrid Earnshaw. [from old catalog]14aThe ultra high frequency performance of receiving valves /c[by] W.E. Benham & I.A. Harris Foreword by Harold Everard M. Barlow.  aLondon :bMacdonald,c1957.  a173 p. :bill. :c23 cm.  aincludes index. 0aVacuum-tubes. 0aVacuum-tube circuits. [from old catalog] 0aShortwave radio.1 aHarris, Ian Arthur, [from old catalog]ejoint author.