OPAC:Department of National Museum-Sri Lanka Search for 'su:"Oya"'

ශ්‍රි ලංකාවේ ජෛව විවිධත්වය සහ මධ්‍යකාලීන පාරිසරික අර්බුද

By Karunaratna,H.K.N.. Borella Wijesuriya 2009 . 234p,Pl., 21 cm

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මහවැලි ව්‍යාපාරය සහ අරමුණ

Ministry of Mahaweli 1981 . 52p., 25 cm

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Mahaweli projects & programme 1982

Ministry of land and land development 1981 . 52p., ill., 27 cm

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ලංකාවෙි ගංගා නිමින සංවර්ධන ව්‍යාපාරය

By Veerathunga, N.. Colombo M.D. Gunasena 1967 . 40p., 22 cm

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Food and the people

By Brohier, R.L.. Colombo Lake house 1975 . 186p.,2pl., ill., 22 cm , Epigraphical map of Ceylon

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Ancient irrigation works in Ceylon

By Brohier, R.L.. Colombo Goverment press 1935 . 77p., ill.,map, 32 cm

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Ancient irrigation works in Ceylon

By Brohier, R.L.. Colombo Goverment press 1935 . 77p., ill.,map, 32 cm

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Geology of the country around Battulu oya & Puttalam

By Cooray, PG.. Geological survey and mines Burea 1995 . 52p., 28 cm

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Geology of the country around Battulu oya & Puttalama

By Cooray, PG.. Dehiwala Geological survey & mines burean 1995 . 52p., ill., 30 cm

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The Institution of Engineers Sri lanka

By Wijesundera,S.De.S.. Author Publishing 2006 . Pl,219p., 30 cm

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රුහුණු රුවන

. 20p., 21 cm

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රුහුණු රුවන

. 20p., 21 cm

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මහවැලි ව්‍යාපාරය

. 20p., ill., 21 cm

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මහවැලි ව්‍යාපාරය

. 8p., ill., 23 cm

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දෙස රැක දෙන ගොවි ජනපද

By Jayasuriya, Gamini. . 67p., 22 cm

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දියවර

. 16p.,5pl., ill., 27 cm

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දියවර

. 117p., ill., 27 cm

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තිස් වසරක පිය සටහන්

. 72p., ill., 27 cm

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The national parks of Ceylon

By De Alwis L.Y.N.. 1969 . 89p., ill., 25*20 cm

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The accelerated Mahaweli programme and its impact

By Karunatilake, H.N.S.. 1988 . 195p., 22 cm

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Mahaweli projects & programme

1986 . 128p., ill.,map., 27 cm

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Ceylon Geology : The Crystalline limestones of Ceylon

By Coomara-swamy,A.K.. Hertford Stephen Austin Sons 1902

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Mediaeval Topography

By Codrington,H.W.. Colombo 1925

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Notes on Visit tp the Batticaloa and Trincomale Light Railway.

By Bowen,M.Cole.. Colombo Apothecaries Co.Ltd 1925

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The Engineering Association of Ceylon Established 1906 : Transactions for 1929

By Woodeson,Austin.. ? Hony.Secretary 1929

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Ancient Irrigation Works in Ceylon

By Brohier, R.L.. Colombo Government press 1935

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නවයුගය

By Liyanage,S.H. Colombo Lake House 1960

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Seeing Ceylon

By Brohier,R.L.. Colombo Sooriya

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Malwathu oya : the fountain of Anuradhapura civilization

By Haputhanthri, Kumudini Dias. Nugegoda : Sarasavi Publishers, 2023 . 58 p. : photos ; , English translation of "මල්වතු ඔය" 21 cm.. 9789553127464

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