Stow, 1930 — Rock-Paintings in South Africa from parts of the Eastern Province and Orange Free State copied by George William Stow with an Introduction and Descriptive Notes by Dorothea F. Bleek. L., 1930.
Tongue — Bushman Paintings copied by M. Helen Tongue. Ox., 1909.
Type(s) — The Types of the Folktale. A Classification and Bibliography Antti Aarnes's Verzeichnis der Marchentypen (FF communications, № 3). Translated and Enlarged by Stith Thompson, Second Revision. Helsinki, 1964 (-FFS 184).
Westphal, 1956 — E. O. J. Westphal. The non-bantu languages of Southern Africa. A. N. Tucker and M. А. Вгуап. The non-bantu languages of North-Eastern Africa. Ox., 1956.
Westphal, 1962 — E. O. J. Westphal. On classifying Bushman and Hottentot Languages. — «African Language Studies», III, 1962, s. 30–48.
Westphal, 1963 — E. O. J. Westphal. The Linguistic Prehistory of Southern Africa: Bush, Kwadi, Hottentot and Bantu Linguistic Relationships — «Africa». Vol. XXXIII, 1963, с 237–265.
Zauberhorn — Das Zauberhorn. Marchen und Tiergeschichten der Tindiga [Hrsg von Prof. Dr. Ludwig Kohl-Larsen] [cop. 1956].