World Archives Project: Washington and Montana Naturalization Indexes
From Ancestry.com Wiki
About this project This project consists of index cards and lists of individuals who applied for naturalization in the states of Washington and Montana, between the years 1850 and 1974. It has a difficulty rating of "Easy" because the document types are in standard formats.
There are a few instances where index pages were photographed close together, and at times may overlap. Please be aware that information on the digital image may be from two different index pages.