The flag of Liberia. New York Publik Library Archive, 25. Juni 2010, abgerufen am 9. Februar 2011 (englisch): „Source: Liberia by Sir Harry Johnston; with an appendix on the flora of Liberia by Dr. Otto Stapf ; 28 coloured illustrations by Sir Harry Johnston, 24 botanical drawings by Miss Matilda Smith, 402 black and white illustrations from the author's drawings and from photographs by the author and others, 22 maps by Mr. J. W. Addison, Capt. H. D. Pearson, R. E., Lieut. E. W. Cox, R. E., and the author. / Liberia, volume 1. Source Description: 2 v. : ill. (incl. ports., maps), 28 col. pl. (incl. fronts., port.), 4 folded maps ; 25 cm. Location: Schomburg Center for Research in Black Culture / General Research and Reference Division Catalog Call Number: Sc 916.66-J (Johnston, H. Liberia) Digital ID:1112118 Record ID: 55493“
