- Biography of Hassler Whitney in Modern scientists and engineers, McGraw-Hill (1980), pp. 309--310. The entries in this reference work were written by scientists and they contain a summary of the subject’s major works but also frequently conclude with other information that is often hard to come by otherwise. The entry for Whitney, for example, dwells on his interest in mathematics education, something that the Wikipedia article only touches on briefly.
- Biography of Hassler Whitney at MacTutor History of Mathematics
- Biography of Hassler Whitney at Wikipedia
