Indian standard for door handles for mortice locks (vertical type) 
Indian Standards Institution 
 - New Delhi  Indian Standards Institution  1975 
 - 9p. 
<br/><br/> IS 4992 : 1975 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Door Handles<br/> Standards <br/>NASA Thesaurus 
<br/><br/><label>Universal Decimal Class. No.: </label>083.7:683.33.071.2  / ISI