Rhif ArchifTeitlLefelDisgrifiadCyfrwngDelweddauRhif Archif6514466Teitl70_249_0101 - Ordnance Survey Vertical Aerial Photography CollectionLefelItemDisgrifiadBlack and white aerial photograph of Glyn Rhonwy slate quarry taken by the Ordnance Survey on 19th October 1970 at an altitude of 7500 feet. Grid reference SH5560. Print enlargement (c. 20") taken from 9" film roll.CyfrwngPhoto.DelweddaunRhif Archif6022314TeitlNMR Site FilesLefelItemDisgrifiadLetter from Gwynfor Pierce Jones concerning Glynrhonwy Quarry.CyfrwngText.Delweddaun
