System for measuring mail delivery performance :  its accuracy and limits, United States Postal Service. 

 - [Washington, D.C.,  1975]. 
 - [4], ii, 27 p. 
 - Report to Congress, by Comptroller General of United States ;  GGD-75-109 .
<br/><br/> Cover title.  [B--114874].  Oct. 17, 1975.  Distribution made by issuing office, paper, each, $1.00.  4to.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Postal service--United States.
<br/><br/><label>Gov. Doc. Class. No.: </label>GA 1.13:GGD-75-109