Kiyaga-Mulindwa, David The earthworks of the Birim Valley, Southern Ghana / by David Kiy aga-Mulindwa - England : University Microfilms International, 1978 - 262 p. : maps, diags; 21 cm. Dissertation (Ph. D.) - The Johns Hopkins University International , 1978 Includes bibliographical references (p. 255-262) Subjects--Topical Terms: Earthworks (Art) -- Ghana -- Birim Valley