1920 U.S. census, Cornville, Somerset County, Maine, ED 101, sheet 3A, lines 10-13: Elmer Libby household with Nellie M. Russell, stepdaughter, 17 (crop).
Image · dated 1920 · source: National Archives (NARA T625).

How it is shown: Cropped (the whole page was not retained); no retouch, no search highlight.
Keep in mind: A crop. The stepdaughter relationship is the enumerator's. 'Nellie M.' is read as Natalie Mildred.