8-tunniline tööpäew : tööpäewa lühendamise tähtsus, wajadus, wõimalus ja selle tegelikud saawutused
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URL: http://www.digar.ee/id/nlib-digar:770082
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Available at the authorised workplace in the National Library of Estonia, Archival Library of the Estonian Literary Museum, Tallinn University of Technology Library, Academic Library of Tallinn University and University of Tartu Library
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URL: http://www.digar.ee/id/nlib-digar:770082
