:

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    (Buenaventura)

    (Buenaventura)

    , . 174 . (1992). . 1540.

    (Berngardi) (1769-1820)
    (Baeckeland) (1863-1944)
    (Borman) ( . 1928)
    (Alle) (1890-1952)
    ( a- - . neros - )
    :