Williams, RobertBunn, Matthew2020-06-232001Williams, Robert, Matthew Bunn, et al. "Advanced Energy Supply Technologies. In World Energy Assessment: Energy and the Challenge of Sustainability." United Nations Development Programme, 2001.92-1-126126-0http://nrs.harvard.edu/urn-3:HUL.InstRepos:42674285en-USResearch Paper or Report2016-04-2020012020-06-23