Northern Miner Press, Toronto, 1981.  Soft cover, 448 pages, 50^th anniversary edition.  Wraps have edge and cover wear, some soil, creases; ink markings on front and rear covers and verso of rear cover; binding sound.  Some ink markings inside primarily on ad pages.  Illustrated with maps and advertisements.  ‘…maps, summaries of producing mines, tables of metal prices and production, listings of smelters, refineries, associations and government departments.’ (from Foreword)