TY - GEN AU - De Silva, M. Asoka T TI - Evolution of technological innovations in ancient Sri Lanka SN - 9789556651409 U1 - 954.93 PY - 2011/// CY - Colombo PB - Vijitha Yapa KW - ANCIENT SRI LANKA KW - ARCHEOLOGY KW - HISTORY KW - SRI LANKAN HISTORY KW - TECHNOLOGY HISTORY ER -