Ancestry.com
 

Eisenberg, Ellen, Embracing a Western Identity, Jewish Oregonians 1849-1950; Corvallis, Oregon, Oregon State University Press, 2015; with permission from Ellen Eisenberg

Eisenberg, Ellen, “Jews in Oregon,” article in oregonencyclopedia.org, at

Google searches

Lowenstein, Steven, The Jews of Oregon 1850-1950; Portland, Oregon, Jewish Historical Society of Oregon, 1987; with permission from the Oregon Jewish Museum [formerly the Jewish Historical Society of Oregon]

NewsBank, inc. Articles about the Abrahamsons: 

Rabbi Abrahamson’s reelection, Morning Oregonian, Portland, November 12, 1911, page 20

Morton’s death, Morning Oregonian, Portland,  September 16, 1913, page 9

 
Oregon Jewish Life Magazine, www.ojlife.com. Publisher:  Publisher@ojlife.com, 6680 SW Capitol Hwy., Portland, OR, 97219. Volume 4, Issue 10, January 2016, article about Gladys Loewenberg Trachtenberg

Oregon Jewish Museum and Center for Holocaust Education, https://www.ojmche.org/oral-history-people/gladys-loewenberg-trachtenberg/, oral history and article about Gladys Goodman Trachtenberg, accessed on Oct. 3, 2020.

https://www.rhodesjewishmuseum.org/history/emigration/, accessed on 1 December 2020. Photo of groundbreaking ceremony for Ahavath Achim synagogue, 1929

Suwol, Samuel Merton, Jewish History of Oregon, Portland, Oregon, 1958, 11 pages [probably self-published at his law firm], available at Amazon.com. Thanks to Wayne Burton, MD, for sharing his copy.

Wikipedia, the Free Encyclopedia. wikipedia.com. https://en.wikipedia.org/wiki/Portland,_Oregon