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Memoirs of the National Academy of Sciences.

v. 23 (1941)

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v. 17 (1924)

Memoirs of the National Academy of Sciences.

v. 19 (1927)

Memoirs of the National Academy of Sciences.

v. 15 (1921)

Memoirs of the National Academy of Sciences.

v. 13 (1915)

Memoirs of the National Academy of Sciences.

v. 21 (1926)

Memoirs of the National Academy of Sciences.

v. 8 (1896)

Memoirs of the National Academy of Sciences.

v. 10 (1911)

Memoirs of the National Academy of Sciences.

v. 12 (1914)