These are Library of Congress Subject Headings, and in the Library of Congress’s usage, the difference is nationality. African Americans are from the United States; Blacks are people worldwide.

What is framed as an Index Catalogue of the Library of the Surgeon-General's Office at Washington constitutes in effect a dictionary of all medical and surgical literature, ancient and modern ...

Monica Duke, Bruce C. Clarke Library director, credited Fort Leonard Wood’s reliability in record-keeping to the work of one person — Shannon Solomon, a technician who catalogs every new ...