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- 81189451 contributor B4074366.
- 81189451 created "1979.".
- 81189451 date "1979".
- 81189451 date "1979.".
- 81189451 dateCopyrighted "1979.".
- 81189451 extent "83 p. ;".
- 81189451 issued "1979".
- 81189451 issued "1979.".
- 81189451 language "bul engrus".
- 81189451 language "bul".
- 81189451 subject "MLCS 93/10787 (H)".
- 81189451 subject "Trade unions; labor efficiency".
- 81189451 title "Roli︠a︡ta i zadachite na profsŭi︠u︡zite za povishavane proizvoditelnostta na obshtestvenii︠a︡ trud v NRB / Ilii︠a︡ Genchin.".
- 81189451 type "text".