TY - BOOK AU - Kovalik, Vladimir AU - Kovalik, Nada TI - මුහුදු ලෝකය SN - 9789552075070 U1 - 551.46 PY - 2004/// CY - Colombo PB - S. Godage KW - Earth Sciences KW - Oceanography N1 - Sinhala translation of 'The ocean world' ER -