Sheet 1. England, Scotland and Northern Ireland (north of national grid line 500 kms N) / compiled by the Institute of Geological Sciences. 1972 -- Sheet 2. England & Wales (south of national grid line 500 kms. N.) / compiled by the Geological Survey. 1965.
Includes index of sheets and inset showing incidence of grid letters for each sheet. At head of legend: Ordnance Survey 1/625,000 map of Great Britain.