^Dates according to Lee Micklin, Eckstein, Nathan (1873-1945), HistoryLink, August 26, 1999. Accessed online 2009-10-20. Biography of Nathan Eckstein, Eckstein Middle School (Seattle), accessed online 2009-10-20, gives his birthdate as a decade later, which does not fit in reasonably with the chronology of his life. "نسخة مؤرشفة". مؤرشف من الأصل في 2016-05-18. اطلع عليه بتاريخ 2019-07-09.{{استشهاد ويب}}: صيانة الاستشهاد: BOT: original URL status unknown (link)
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