TY - BOOK AU - Strahan,Aubrey TI - On the thicknesses of strata in the counties of England and Wales, exclusive of rocks older than the Permian T2 - [Gt. Brit. Geological survey] Memoirs of the Geological survey, England and Wales AV - QE261 .S85 PY - 1916/// CY - London PB - Printed for H. M. Stationery off., by J. Truscott and son, ltd. N1 - Published by order of the lords commissioners of His Majesty's Treasury ER -