https://www.zvab.com/RITES-SECRETS-PRIMITIFS-LOUBANGUI-Vergiat-A.m/27032826/bd
Paris - 1936 - 212 pages of text containing 33 drawings, plus 29 unnumbered pages of photographs. Biebuyck, 817 (later ed.). - LES RITES SECRETS DES PRIMITIFS...
lesritessecretsdesoubangui
https://www.stedelijk.nl/en/collection/101395-ed-van-der-elsken-sjem-dochtertje-van-een-dorpshoofd-met-haar-struisvogeltje-oubangui-chari-centraal-afrika-1957
vaneenmethaaroubangui