Rossberg, Ehrhard A. <br/><br/>
Teleprinter switching / 
by Ehrhard A. Rossberg and Helmut E. Korta. Seyringer] 
 - Princeton, N.J. :  Van Nostrand,  1960. 
 - 351p. :  ill. ;  24cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teletypewriters.
<br/><br/><label>Dewey Class. No.: </label>621.3825  / ROT 1960