Getting results with ludlow-saylor screens :  A summary of americas latest experience in screening practice and screen-control of process operations 

 - 190 páginas 
 - Catalogue ;  no. 48 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cinematografía
<br/><br/><label>LC Class. No.: </label>PN1993.7  / G47