BTS  / MONO B-585 <br/>
Frederick,H A <br/>
       THE DEVOLPMENT OF THE MICROPHONE 
 / 
 .-  Electrochemical Society, Usa,  1931 
 .- 29 . 
<br/>Bound With Bts Mono-B-580-584,586-598.Lack No-B-587,599,594-595. 
<br><U>Copy Details:</u><br> Acc. No.: <b>TR16537</b>, Full Call No.: BTS MONO B-585,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>