Allen.D.N.G. <br/><br/>
Relayation Methods.(1954). 

 - 1st Ed. 
 -  Tata McGraw-Hill Publishing Company Limited  1956 
 -  22 cm. 
<br/><br/><br/>Text in English 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>APM
<br/><br/><label>Index Terms--Genre/Form: </label><br/>B-10
<br/><br/><label>Dewey Class. No.: </label> / ALL