Specification for envelopes for commercial, official and professional use / 
British Standards Institution. 
 - 6 leaves :  illustrations ;  33 cm. 
 - British standard ;  BS 4264 : 1987 .
 - British standard ;  BS 4264 : 1987 .
<br/><br/><label>ISBN: </label>0580160645 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Design.<br/>Envelopes.<br/>Dimensions.