Postcode sector maps, Great Britain and N. Ireland /
Edinburgh : John Bartholomew & Son ; London : Post Office,
c1982-
Shows area and sector boundaries, postcodes, and sector numbers.
Base map: Bartholomew 1:100,000 maps of Great Britain.
Includes later rev. eds. of some sheets.
Incomplete: Wanting sheets 1, 11, 17, 22, 34, 37, 40-41, 43, 47-63 [northern Scotland & N. Ireland]