Langer Rudolgh E Ed. <br/><br/>
On numerical approximation 
Langer Rudolgh E Ed. 
 -  1959 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Analysis
<br/><br/><label>Dewey Class. No.: </label>B311, J9