California Institute of Technology, Hutchings, E., Hutchings, E., & Bell, D. (1967). Scientific progress and human values: Proceedings of the conference celebrating the 75th anniversary of the California Institute of Technology. American Elsevier Pub. Co..

California Institute of Technology, Edward Hutchings, Elizabeth Hutchings, и Daniel Bell. Scientific Progress and Human Values: Proceedings of the Conference Celebrating the 75th Anniversary of the California Institute of Technology. New York: American Elsevier Pub. Co., 1967.

California Institute of Technology, et al. Scientific Progress and Human Values: Proceedings of the Conference Celebrating the 75th Anniversary of the California Institute of Technology. American Elsevier Pub. Co., 1967.