The half-blood : a cultural symbol in 19th century American fiction / William J. Scheick. (OCLC #897378817)
650 _0 ǂa Indians of North America ǂx Mixed descent.
The subject heading “Indians” has the scope note:
Here are entered works on the aboriginal peoples of the Western Hemisphere, including Eskimos. Works on the inhabitants of India in general are entered under East Indians.
My colleague Karen Nuckolls is publishing an update to her 1994 article “The Library of Congress Subject Heading Shortfall” which mentions this as an example of a term which needed (and apparently still needs) to be updated.