Yourgrau , Wolfgang . <br/><br/>
Variational Principles in Dynamics and Quantum Theory /  Textual Documents 
Wolfgang Yourgrau & Stanley Mandelstam. 
 - 3rd ed. / 
 - London :  Sir Isaac Pitman & Sons,Ltd ,  1968. 
 - xii,201p. ;  22cm. 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Dynamics Quantum Theory G-Physics 
<br/><br/><label>Dewey Class. No.: </label>531.3  / Y 84 V