00385nam a22001457a 4500 12629 12629 210210b ||||| |||| 00| 0 eng d 658.15 G9775 1999 Gupta, R. S. Plant economics New Delhi: National Productivity Council 1972 54p. 7.50 Engineering economy BK 0 0 ddc 0 658_150000000000000_G9775 0 23306 CL CL 1973-06-16 Sankar’s Book Agency 658.15 G9775 03928 2021-02-10 BK