sack, k., & linsel, h. (1965). contents and measuring of labour productivity in socialist industry. the institute of national planning.
Tohutoru Kātū Chicago (17th ed.)sack, kurt, me hermann linsel. Contents and Measuring of Labour Productivity in Socialist Industry. cairo: the institute of national planning, 1965.
Tohutoro MLA (9th ed.)sack, kurt, me hermann linsel. Contents and Measuring of Labour Productivity in Socialist Industry. the institute of national planning, 1965.
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