1. Ahlich, J.A., Jr. and Hinman, R.E., Effective Utilization of Solar Energy to Produce Clean Fuel, report to the National Science Foundation, Stanford Research Institute, Menlo Park, Calif.
2. The Global Carbon Dioxide Problem;Baes,1976
3. Energy Demand Studies: Major Consuming Countries, Analysis of 1972 Demand and Projects of 1985 Demand,1976
4. Hydrogen, Oxygen and Natural Gas by Pipelines: Comparative Transport Costs;Beghi,1973