Disgrifiad
Measured plan and section view showing the top of the tramway incline at Graig Merthyr Colliery, produced by B.A. Malaws and D.K. Leighton, March 1981.
Enw Casgliad
SC - RCAHMW Swansea Canal Publication Collection
Cychwynnwr
David K. Leighton, Mr Brian A. Malaws, RCAHMW
