%O This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. %K Applied geochemistry, Cartography, Mathematical geology %I Applied Geochemistry Research Group, Imperial College of Science, Technology and Medicine %C London, UK %L discovery10095955 %T Factor score maps of regional geochemical data from England and Wales %P 1-2 %D 1978 %A SJ Mancey %A RJ Howarth