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  1. 1
    Published 1993
    Ulan-Udė : Baĭkalʹskiĭ in-t ra︠t︡sionalʹnogo prirodopolʹzovani︠i︡a SO RAN, 1993.
    108 p. ; 21 cm.
  2. 2
    Published 1988
    New Delhi, India : UNESCO-UNEP International Environmental Education Programme, 1988.
    327 p. : ill. ; 25 cm.

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