I found Myra J. Eyerly that passed away on November 21, 1946 in Marion County. Her certificate # is 7928. If you want to order her death certificate from the Oregon State Archives, depending on where you live, it would be $10 for out of state. They are very fast with the requests, and usually have them to you within 5 days.
Oregon State Archives 800 Summer Street Ne Salem, Oregon 97310 (503) 373-0701
If you have a credit card, you can call and order the certificate over the phone. This will list information on burial, which motuary took care of her and who provided the information to them, along with addresses.
Hope this helps. If you want other information such as census records let me know.