00572 a2200193 4500 9789556651409 909.095493 DES 27679 47896 De Silva, M. Asoka Evolution of technological innovations in ancient Sri Lanka Colombo Vijitha Yapa 2011 2011 xxv, 444p.. 24cm. Sri lanka Civiliztion - Sri Lanka Technological innovation Sri Lanka Technology - Sri Lanka Technology - Civilization - Sri Lanka SC 54380 54380 0 0 ddc 0 0 SPC MAIN MAIN SLC 2012-02-08 0 909.095493DES 33316 2017-08-24 00:00:00 0.00 2016-10-31 PR 0 0 0 0 LEN MAIN MAIN LEN 2012-02-08 1 909.095493DES 33317 2023-08-11 00:00:00 2023-07-28 0.00 2016-10-31 L