Citations
'Colour printing in the Ordnance Survey Office' (Young) and 'Colouring of geological maps' (Gerken), 1972-11 - 1974-05, GBR/3296/Maps/CCSA.IM_518_4, IM_518_4. Cambridge University Library. |
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'Colour printing in the Ordnance Survey Office' (Young) and 'Colouring of geological maps' (Gerken), 1972-11 - 1974-05, GBR/3296/Maps/CCSA.IM_518_4, IM_518_4. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/240202 Accessed November 15, 2024. |