00603cam a22002171 4500 gs 26000255 DLC 20260227111330.0 720627s1926 xx 000 0 eng gs 26000255 (OCoLC)343241 DLC OMC DLC premarc QE33 .C5 Chalmers, Robert Mair. Geological maps; the determination of structural detail. Oxford, Oxford University Press; London, H. Milford, 1926. vii, 175 p. illus. Geology Maps Cartography 26474 26474