Indian standard specification for parallel keys and kyeways 
Indian Standards Institution 
 - New Delhi  Indian Standards Institution  1975 
 - 7p. 
<br/><br/> IS 2048 : 1975 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Parallel Keys-Standards<br/> Standards <br/>NASA Thesaurus 
<br/><br/><label>Universal Decimal Class. No.: </label>083.7:621.886.8  / ISI