por American Association for the Advancement of Science. Committee on Science in the Promotion of Human Welfare. Air Conservation Commission.
por Galtsoff, Paul S. (Paul Simon), 1887-1979 [editor] | Lutz, Frank Eugene, 1879-1943 [editor] | Welch, Paul S. (Paul Smith), 1882-1959 [editor] | Needham, James G. (James George), 1868-1957 [editor] | American Association for the Advancement of Science.
por American Association for the Advancement of Science.