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by Fennell, James Hamilton; National Academy of Sciences
by Smith, Mae Connie Trovillion; National Academy of Sciences
by Panel on the Assessment Program, Nationa; National Academy of Sciences
by Jones, Edward Safford; National Academy of Sciences
by Sargent, Lucius Manlius; National Academy of Sciences
by Gantt, Henry Laurence; National Academy of Sciences
by National Academy of Sciences Scientific
by Silliman, Benjamin; National Academy of Sciences
by National Academy of Sciences
by Webster, William; National Academy of Sciences