Columbia subject headings:
Brouwer, L. E. J. (Luitzen Egbertus Jan), 1881-1966.
Mathematicians--Netherlands--Biography.
Harvard subject headings:
Brouwer, L. E. J. (Luitzen Egbertus Jan), 1881-1966.
Mathematicians--Netherlands--Biography.
Princeton subject headings:
Brouwer, L. E. J. (Luitzen Egbertus Jan), 1881-1966.
Mathematicians--Netherlands--Biography.