=LDR 22 4500 =001 1356 =082 04$a526.9 CLO =100 1\$aClose, Charles =245 10$aThe Early Years of the Ordnance Survey =260 \\$aNewton Abbot :$bDavid and Charles,$c1969 =650 \0$aBooks =852 \\$bFreeman Library$h526.9 CLO