Steelman, J. R. (1947). Science and public policy: A report to the President. U.S. G.P.O.
Lua i Stíl Chicago (17ú heag.)Steelman, John Roy. Science and Public Policy: A Report to the President. Washington: U.S. G.P.O, 1947.
Lua MLA (9ú heag.)Steelman, John Roy. Science and Public Policy: A Report to the President. U.S. G.P.O, 1947.
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