Blokhuis, W. A. (1993). Vertisols in the central clay plain of the Sudan. s.n..
Chicago Style (17th ed.) CitationBlokhuis, W. A. Vertisols in the Central Clay Plain of the Sudan. [Netherlands?: s.n., 1993.
MLA (8th ed.) CitationBlokhuis, W. A. Vertisols in the Central Clay Plain of the Sudan. s.n., 1993.
Warning: These citations may not always be 100% accurate.