The idea of progress :
Hildebrand, George H.
The idea of progress : A collection of readings. / Selected by Frederick J. Teggart ; Ed., wite an introduction by G. H. Hildebrand. - Rev. ed. / with an introduction by George H. Hildebrand. - Berkeley : University of California Press, 1949. - xi, 457 p.
Progress.
History--Philosophy.
The idea of progress : A collection of readings. / Selected by Frederick J. Teggart ; Ed., wite an introduction by G. H. Hildebrand. - Rev. ed. / with an introduction by George H. Hildebrand. - Berkeley : University of California Press, 1949. - xi, 457 p.
Progress.
History--Philosophy.