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1Published 1993### CRL customization ### ?> ### Add publisher and desc details ### ?>Ulan-Udė : Baĭkalʹskiĭ in-t ra︠t︡sionalʹnogo prirodopolʹzovani︠i︡a SO RAN, 1993.108 p. ; 21 cm.
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2Published 1988### CRL customization ### ?> ### Add publisher and desc details ### ?>New Delhi, India : UNESCO-UNEP International Environmental Education Programme, 1988.327 p. : ill. ; 25 cm.