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  1. 1
    Published 1982
    Koḷamba : Piyasēna Guṇatilaka, [1982]
    44 p. [1] leaf of plates : port. ; 22 cm.
  2. 2
    Published 1993
    [Colombo : Institute of Chemistry, Ceylon, 1993]
    v, 52 p. : ill. ; 30 cm.
  3. 3
    Published 1979
    Colombo : Sri Lanka Foundation Institute, 1979.
    112 p. ; 26 cm.

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