1. US real product and real factor input;Christensen;The Review of Income and Wealth,1970
2. US productivity growth by industry, 1947–1973;Gollop,1980
3. Macroeconomics;Gordon,1984
4. Multi-factor productivity in US manufacturing, 1949–1983;Gullickson,1987
5. The role of energy in productivity growth;Jorgenson;The Energy Journal,1985