"From Outer Space - Advances For Medicine on Earth" by Hubertus Strughold, contributed in "Space, Its Impact on Man and Society" by Lillian Levy, (p. 117), 1965.
"THE BILL GATES INTERVIEW: An energy miracle is coming, and it's going to change the world". Interview with Drake Baer, www.businessinsider.com. February 22, 2016.