Compact efficiency   : proceedings of the twenty-second annual conference and exposition 
/ edited by Rita Mass. 
 - 1a ed. 
 - Silver Spring, Maryland :   The National microfilm Association,   1973 
 - v, p.v. :   il. ;   23 cm. 
<br/><br/>Incluye índice 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Microfotografía
<br/><br/><label>LC Class. No.: </label>TR835  / C66 1973