From Tom Lynch, editor, Western American Literature:
When we moved the Western American Literature editorial offices here to Lincoln, we decided to discontinue the requirement that article submissions include a mailed in paper copy. However paper versions continue to arrive in the mail.
In the not-too-distant future (I hope) we will have an online submission portal at the University of Nebraska Press. In the meantime, we are accepting article submissions as email attachments. No paper version required.
Here are further details: http://www.unl.edu/plains/western-american-literature