Hazard, Daniel L <br/><br/>
Directions for magnetic measurements 
Daniel L  Hazard                                           
 - 3rd ed. 
 - Washington  U. S. Department of Commerce  1930 
 - vi, 129p. 
 - U.S. department of commerce; 166 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magnetism
<br/><br/><label>Universal Decimal Class. No.: </label>538  / HAZ