Originally published in 1970 this edition came out in 2001. As new, unread, unclipped and not remaindered. Interior is crisp, clean and solid. Corners are sharp and square. Clean black titles to spine. Dustjacket is very lightly bumped to extremities with minor shelfwear to show. Now protected in brodart jacket. "Canadian Communications Foundation" bookmark laid in. Marconi who? Canadian Reginald Fessenden was the first to transmit the human voice over the air in December of 1900.