World Energy Conference. Conservation Commission, Auer, P. L., & Armstrong, E. L. (1978). Renewable energy resources: The full reports to the Conservation Commission of the World Energy Conference; 'Unconventional energy resources'. IPC Science and Technology Pr. for the WEC.

World Energy Conference. Conservation Commission, P. L. Auer, and Ellis L. Armstrong. Renewable Energy Resources: The Full Reports to the Conservation Commission of the World Energy Conference; 'Unconventional Energy Resources'. Guildford: IPC Science and Technology Pr. for the WEC, 1978.

World Energy Conference. Conservation Commission, et al. Renewable Energy Resources: The Full Reports to the Conservation Commission of the World Energy Conference; 'Unconventional Energy Resources'. IPC Science and Technology Pr. for the WEC, 1978.