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References
- Garrett Birkhoff (1988). "Mathematics at Harvard, 1836–1944". In Peter Duren; Richard A. Askey; Uta C. Merzbach (eds.). A Century of Mathematics in America — Part II (PDF). History of Mathematics. Vol. 2. Providence, RI: American Mathematical Society. pp. 3–58. ISBN 0-8218-0130-9.
- Haverford College Bulletin, Vol. 35–36, 1936–1938
- ↑ Whitman (1946), p. 522
- ↑ Birkhoff, Whitman (1949), p. 136
- ↑ Haverford Bulletin p. 12 (= vol.35, p. (6))
- ↑ Haverford Bulletin p. 125 (= vol 35., p. 99)
- ↑ Haverford Bulletin p. 429 (= vol.36, p. 101)
- ↑ Haverford Bulletin p. 433
- ↑ Haverford Bulletin, p. 128, 432
- ↑ Haverford Bulletin p. 428 (= vol.36, p. 100)
- ↑ Birkhoff (1988), p. 50
- ↑ Birkhoff (1988), p. 24
- ↑ Record at Harvard library
- ↑ Haverford News, Vol.33, No.5, Tue 28 Oct 1941, p. 8 (7)
- ↑ Bulletin of the AMS, Jul 1947, p. 715
- ↑ Notices of the AMS Vol.42, No.12, Dec.1995, p. 1555
