Columbia subject headings:
Authors, Arab--Sudan--Biography.
Communists--Sudan--Biography.
Ḥarḥūf, Aḥmad al-Ṭayyib.
Harvard subject headings:
Authors, Arab--Sudan--Biography.
Communists--Sudan--Biography.
Ḥarḥūf, Aḥmad al-Ṭayyib.
Princeton subject headings:
Authors, Arab--Sudan--Biography.
Communists--Sudan--Biography.
Ḥarḥūf, Aḥmad al-Ṭayyib.