Electronic time measurement 

 - McGraw-Hill Book Company, Inc.  New York  1949 
 - 538p.  Fig. and Chart 
<br/><br/>Chance, B.  Chance, B. 
<br/><br/><label>Nat. Bib. No.: </label>631 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>621.38  / ELE