00583nas a22002054a 4500001000800000003001100008005001700019008004100036040002600077041000800103044000800111245002500119260004000144300002300184310001000207362003600217655001300253710009700266866001400363GMR-653AR-SsjUBGM20251222151458.0251021k19521964xxkar g 000 0 eng d bspacAR-SsjUBGMeaacr aeng axxk00aSummary of Progress. aLondon :bGeological Survey,c1952- av. :bil. ;c24 cm aAnual1 aEn biblioteca años 1952-1964. 4aMemorias1 aGran Bretaña.bDepartment of Scientific and Industrial Research. Geological Surveyeeditor 0a1952-1964