-
1de réir Ridge, John Drew, 1909-Ábhair “...Mines and mineral resources Africa Bibliography....”
Foilsithe / Cruthaithe 1976
LEABHAR -
2Foilsithe / Cruthaithe 2004Ábhair “...Mines and mineral resources Library resources Congresses....”
Imeacht comhdhála LEABHAR