Yardley, Herbert O.,  1889-1958 <br/><br/>
The American black chamber /  
Herbert O. Yardley. 
 - Annapolis, Md. :   Naval Institute Press,  [2004]. 
 - 375 p. :    ill. ;  23 cm. 
 - Bluejacket books .
<br/><br/> Originally published: Indianapolis : Bobbs-Merrill, 1931. 
<br/><br/><label>ISBN: </label>1591149894 
<br/><br/><label>Subjects--Corporate Names: </label><br/>United States--History
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War 19141918--Secret service--United States<br/>World War 19141918--Military intelligence<br/>Cryptography
<br/><br/><label>LC Class. No.: </label>D639.S7  
<br/><br/><label>Dewey Class. No.: </label>940.54/8673 |2 22