==Books by O. Veblen==* Introduction to infinitesimal analysis; functions of one real variable with N. J. Lennes (John Wiley & Sons, 1907)* Projective geometry with John Wesley Young (Ginn and Co., Vol.
" Introduction to infinitesimal analysis; functions of one real variable — John Wiley & Sons, 1907* "O. Veblen", "John Wesley Young.