Nathan A. Zepell (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Nathan A. Zepell" in English language version.

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doi.org

Calhoun, Ricky-Dale (Summer 2007). "Arming David: The Haganah's Illegal Arms Procurement Network in the United States, 1945-49". Journal of Palestine Studies. 36 (4): 22–32. doi:10.1525/jps.2007.36.4.22.

US 2559555, Zepelovitch, Nathan, "Fountain Pen with Retractable Tip Enclosure", issued July 3, 1951
US 2881736, Zepelovitch, Nathan, "Rocking Side Clip to Extend and Retract Ballpoint Pen Cartridge", issued April 14, 1959
US 3075496, Zepelovitch, Nathan, "Rocking Side Clip to Extend and Retract Ballpoint Pen Cartridge", issued January 29, 1963
US 3871775, Zepell, Nathan A., "Flat Dual Cartridge Ballpoint Pen with Side Clip Mechanism for Reciprocal Movement", issued March 18, 1975

U.S. Holocaust Memorial Museum. "Holocaust Encyclopedia - Latvia". Washington, D.C. Retrieved March 16, 2021.