%A British Geological Survey %T Regional geochemistry of Wales and part of West-central England : stream sediment and soil = Geocemeg rhanbarthol Cymru a rhan o orllwin-canolbarth Lloegr : gwaddod nant a phridd %I British Geological Survey %D 2000 %S Geochemical Atlases / British Geological Survey %V 14 %U https://ci.nii.ac.jp/ncid/BB11009675