Code of federal regulations:  postal services  39 

 - Rev ed as of July 1,1978 
 - Washington :  1980 
 - pt :  23 cm 
<br/><br/> Containing a codification of documents of general applicabilty and future effect as of October 1, 1980 
<br/><br/><label>Dewey Class. No.: </label>343.0992