Robert Boyle (1664). “Some Considerations Touching the Usefulnesse of Experimental Naturall Philosophy, ... by the Honorable Robert Boyle Esq; ...”, p.37
"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.