TY - GEN AU - Senaratne, Athula AU - Karunanayake, Kalpa TI - Transaction costs and institutional innovation:sustainability of tank aquaculture in Sri Lanka T2 - Working paper, no. 18-6 SN - 4681087 U1 - 639.8 PY - 2006/// CY - Kathmandu PB - SANDEE KW - AGRICULTURE KW - AQUACULTURE KW - SRI LANKA KW - TANK AQUACULTURE ER -