நூலகம்> தேசிய கல்வி நிறுவகம்
(1985). සමාජ අධ්යනය. Colombo: Ministry of Education.
1985. සමාජ අධ්යනය. Colombo: Ministry of Education.
සමාජ අධ්යනය. Colombo: Ministry of Education. 1985.
Library Network, National Institute of Education (NIE) Maharagama