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2
A Cost/Benefit Analysis of Clinical Trial Designs for COVID..
NBER working paper series, no. w27882
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3
Annual report of the Board of Regents of the Smithsonian In..
United States congressional serial set ; serial set no. 6740;House document / 63rd Congress, 2nd session. House ; no. 899
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4
Annual report of the Board of Regents of the Smithsonian In..
United States congressional serial set ; serial set no. 5365;House document / 60th Congress, 1st session. House ; no. 847, pt. 1