=LDR 00000nam a2200000ui 4500 =001 6491 =008 250619s1980\\\\xx\|||||||||||||||||eng\d =082 04$a912.042 SEY =100 1\$aSeymour, W.A. =245 10$aA History of the Ordnance Survey =260 \\$aKent :$bWm Dawson & Sons Ltd.,$c1980 =852 \\$bGeography Basement$cBooks$h912.042 SEY