BTS  / MONO 1920 <br/>
Riordan,John <br/>
       TELEPHONE TRAFFIC TIME AVERAGES 
 / 
 .-  ,  1951 
 .- 16 . 
<br/>Bound With Bts Mono 1900-19,1921-29 
<br><U>Copy Details:</u><br> Acc. No.: <b>TR19694</b>, Full Call No.: BTS MONO 1920,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>