Hazard, Daniel L.  <br/><br/>
Directions for magnetic measurements 
Daniel L. Hazard 
 - Washington, D. C.  U. S. Government Print Office  1938 
 - iv+131p.  illus; plates; tables 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magnetic MeasurementsHazard
<br/><br/><label>Universal Decimal Class. No.: </label>550.380.14  / HAZ