Economic commission for Europe   Annual report. 

 - New  York U.N.        1979 
 - Supplement no.12 .
<br/><br/><label>Standard No.: </label>171840 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>"V1N45,93:3.N79 - N78r, L9.1-12/UN"