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Drawing 1 Mersey Tunnel: contract no. … 1933 |
CIV.6 [104.6] Ordnance Survey 1:2500 count … 1933 |
CXI.N.E [111.N.E] Ordnance Survey 1:10,560 cou … 1933 |
CIV.1 [104.1] Ordnance Survey 1:2500 count … 1933 |