Trefftz, Erich <br/><br/>
Graphostatik /  
von E. Trefftz 
 - Leipzig, Berlin,   1936 
 - 90 p. ;   21 cm 
 - Teubners mathematische leitfaden ;  .
<br/><br/><label>Subjects--Topical Terms: </label><br/>ESTATICA GRAFICA
<br/><br/><label>Universal Decimal Class. No.: </label>531.25