westerman, gerhart von. <br/><br/>
opera guide 
gerhart von westerman; edited, with an introduction by harold rosenthal. 
 - new york  E.P. dutton & co.  1964. 
 - 584 p. 
<br/><br/> translation of: knaurs opernfuhrer. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operas--Stories, plots, etc.