Bulletin of the California Institute of Technology (formerly Throop College of Technology) annual catalogue for the year 1919-1920 : including a statement of requirements for admission, a description of the courses of instruction and announcements. Bulletin of the California Institute of Technology 29 :86 (1920). Issued by: California Institute of Technology. https://resolver.caltech.edu/CaltechCampusPubs:20100913-155443633