Microform. [Washington, D.C.], U.S. G.P.O., [19--]- microfiches : negative ; 11 x 15 cm.
Issuing Body:
Prepared by the Address Information Systems Division, Delivery Services Dept., U.S. Postal Service, 1984-1986; Office of Address Information Systems, Delivery Services Dept., U.S. Postal Service, 1987-