The use of sound in workers' education : an instructional aid for workers' educators and trade unionists

Published: Geneva: International Labour Office, 1978.
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245 0 0 |a The use of sound in workers' education :   |b an instructional aid for workers' educators and trade unionists   |c Richard Kassler. 
260 |a Geneva:   |b International Labour Office,   |c 1978. 
999 |a 1000000019  |b Book  |c Open Shelf