TY - BOOK AU - Deraniyagala, S U. AU - S U Deraniyagala. TI - Prehistory of Sri Lanka: : an ecological perspective. Part-I SN - 9559159003 U1 - 930.1 DER PY - 1992/// CY - Sri Lanka PB - : Department of Archaeological Survey KW - Prehistory KW - History of Sri Lanka KW - Sri Lanka ER -