sack, K., & linsel, h. (1966). planning of technical progress in industry: Planning of introducing new technique into production. the institute of national planning.

sack, K., and hermann linsel. Planning of Technical Progress in Industry: Planning of Introducing New Technique into Production. cairo: the institute of national planning, 1966.

sack, K., and hermann linsel. Planning of Technical Progress in Industry: Planning of Introducing New Technique into Production. the institute of national planning, 1966.