(en) Farrington Daniels, Biographical Memoirs Vol XXVII, Washington, National Academy of Sciences of the United States of America, , 441 p. (lire en ligne), p. 293
(en) Farrington Daniels, Biographical Memoirs Vol XXVII, Washington, National Academy of Sciences of the United States of America, , 441 p. (lire en ligne), p. 294.
(en) Farrington Daniels, Biographical Memoirs Vol XXVII, Washington, National Academy of Sciences of the United States of America, , 441 p. (lire en ligne), p. 295
(en) Farrington Daniels, Biographical Memoirs Vol XXVII, Washington, National Academy of Sciences of the United States of America, , 441 p. (lire en ligne), p. 297