Norma Etta Pfeiffer (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Norma Etta Pfeiffer" in English language version.

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archive.org

books.google.com

chicagoreader.com

globalplantcouncil.org

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nytimes.com

  • "Norma Pfeiffer, Expert on Lilies, Dies at 100". The New York Times. 12 September 1989. Retrieved 25 September 2018. 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.

tropicos.org

uchicago.edu

naturalsystems.uchicago.edu

und.edu

commons.und.edu

web.archive.org