Omission of part/volume indicators 
                   
The UN sales number is recorded in subfield $a. The 
				initial language prefix is omitted. Part or volume indicators are omitted. 
                   
                  
 
				 
                   Examples:
				   
	079 $a  02.II.D.12   [appears on publication: E.02.II.D.12]
	 
  	079 $a  GV.02.0.3  [appears on publication: E.GV.02.0.3] 
 
                  
  	079 $a  00.V.11  [appears on publication: E.00.V.11 (Part 1)]
 
	If the UN sales number does not appear on the publication, it may be found
	 in another source such as the  
	  or other official source. 
	  
	  Example: 
 
	079 $a  03.III.B.1  
	500 $a UN sales no. not printed. 
	596 $a Source for UN sales no.: UN Sales Office list no. 218. 
[the user is informed in a General Note that the sales no. is not printed 
on the publication; the source used is recorded in a local Library Note]
	 
	When a UN sales number is recorded in 079, then a 089 $b (Content  
Code) B13 is required. 
 
                   
Corrigenda to sales publications 
 
                  When a corrigendum is
issued to a UN sales publication as a separate document, record the UN sales number in tag 079 on the record for the corrigendum
followed by a comma and the word Corrigendum
(no space precedes the word Corrigendum).
                   
                   
                  
                  Example: 
                   
                  
                  079 $a
                  07.VIII.1,Corrigendum 
                  191 $a
                  ST/SG/AC.10/1/Rev.15/Corr.1 
                  245 10 $a Recommendations
on the Transport of Dangerous Goods. $p Model Regulations : $b
                  corrigendum 1 
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