1. Carboniferous collision : Josef Herman's epiphany in Ystradgynlais /: Josef Herman's epiphany in Ystradgynlais. (March 2006) Authors: Osmond, Ozi Rhys Other Names: Institute of Welsh Affairs, publisher. Record Type: Book Extent: 1 online resource, illustrations (black and white) View Content: Available online (eLD content is only available in our Reading Rooms) ↗