621.38151  / C497o <br/>
Cisin, Harry George <br/>
       OVER 11,000 DIRECT TUBE SUBSTITUTES 
 / 
 .- N. Y.: ,  1963 
 .- 73 . 
<br/><u>Subject Headings:</u> <br/>Electron Tubes;
<br><U>Copy Details:</u><br> Acc. No.: <b>54658</b>, Full Call No.: 621.38151 C497o,   Item type:  Written-off , Location: , <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>