1. E.J. KNAPTON,France: An Interpretive History, Charles Scribner's Sons, New York, 1971, p. 253.
2. S. B. AHMED, Input-Output Analysis in Environmental Monitoring,IEEE Transactions on Systems, Man and Cybernetics, SMC3, 6 (1973) 537–8.
3. K. CHEN, Input-Output Economic Analysis of Environmental Impact,ibid,, SMC 3, 6 (1973) 539–547.
4. I. GUTMANIS, Environmental Implications of Economic Growth in the U.S. 1970 to 2000-Input-Output Analysis,ibid,, 6 (1973) 583.
5. L. D. MAXIM, C. L. BRAZIE, Multistage Input-Output Model for Evaluation of Environmental Impact of Energy Systems,ibid, 6 (1973) 583–587.