U.S. Department of Commerce, National Bureau of Standards. <br/><br/>
Handbook 77  Precision measurement and calibration; v.1:Selected papers on elec... /(by) U.S. Dept. of Commerce. Nat. Bureau of Sta. 

 -  U.S.D.C. N.B.S.  1961 
<br/><br/><label>Dewey Class. No.: </label>621.372  / N61.1 "R"