00253nam a2200133Ia 4500020000900000082001000009100001700019245003000036250000600066260002400072300000800096500000900104650000600113  aNULL  a537.5  aSheth, N. M. 0aRCA Receiving Tube Manual  a-  aBombaybSheth N. M.  a655  a2565  a-