D.R Cox and smith,W.L <br/><br/>
Queues 
D.R.Cox , walter L.Smith 
 - London  Chapman and hall  1961 
 - xii, 179; ill  Pbk 
<br/><br/><label>ISBN: </label>0 412 10930 1 
<br/><br/><label>LC Class. No.: </label>T 57.9 C6