The "Eotvos" torsion balance 

 - London  L. Oertling  s.f. 
 - 90 p.  ilus., láms. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INSTRUMENTOS TOPOGRAFICOS
<br/><br/><label>Universal Decimal Class. No.: </label>A/526.91/E