Indian standard specification for ring spanners 
Indian Standards Institution 
 - New Delhi  Indian Standards Institution  1971 
 - 13p. 
<br/><br/> IS 2029 : 1971 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Ring Washers<br/> Standards <br/>NASA Thesaurus 
<br/><br/><label>Universal Decimal Class. No.: </label>083.7:621.883.14  / ISI