Anderson, J. A.   <br/><br/>
Description and theory of the torsion seismometer 
J. A. Anderson and Harry O. Wood 
 -  1925 
 - 72p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Seismometer
<br/><br/><label>Universal Decimal Class. No.: </label>550.34.03  / AND