Nonconventional scientific and technical information systems 
/ National Science Foundation December, 1966 
 - Washington:  National Science Foundation,  1966 
 - xxx, 558p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Card systems
<br/><br/><label>Subjects--Index Terms: </label>General description Document input 
<br/><br/><label>Universal Decimal Class. No.: </label>D 002"312"  / K2;K6