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  1. 1
    by Vaĭnshteĭn, Boris Aronovich
    Published 1980
    Leningrad : "Nauka," Leningradskoe otd-nie, 1980.
    237 p. : ill. ; 27 cm.
  2. 2
    by Bouillon, Albert
    Published 1957
    Léopoldville, Éditions de l'Université, 1957.
    30 p. illus. 25 cm.

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