Analysis of information sources in references of the Wikipedia article "Norma Etta Pfeiffer" in English language version.
Dr. Pfeiffer, a native of Chicago, received her bachelor's and doctor's degrees from the University of Chicago. Her doctorate was awarded in 1913, following her discovery of a new plant, Thismia americana. At the time, she was 24, the youngest person to receive a Ph. D. from the university.