Bernolak, I., & Bernolak, I. (1982). Productivity measurement and analysis: New issues and solutions; proceedings of Study Meeting on Productivity Measurement and Analysis organised by APO and held in Sri Lanka in Febuary 1982. Tokyo: Asian Productivity Organization.

Bernolak, Imre., and Imre Bernolak. Productivity Measurement and Analysis: New Issues and Solutions; Proceedings of Study Meeting On Productivity Measurement and Analysis Organised By APO and Held in Sri Lanka in Febuary 1982. Tokyo: Asian Productivity Organization, 1982.

Bernolak, Imre., and Imre Bernolak. Productivity Measurement and Analysis: New Issues and Solutions; Proceedings of Study Meeting On Productivity Measurement and Analysis Organised By APO and Held in Sri Lanka in Febuary 1982. Tokyo: Asian Productivity Organization, 1982.