Häll, Harri

URI: http://urn.fi/URN:NBN:fi:bib:me:P00335441206

name

Häll, Harri

Authored works

Works contributed to

Ympäristökasvatus : seminaari Kolin kansallispuistossa 18.-19.4.2002 = Environmental education : proceedings of the seminar at Koli National Park in Finland 18.-19.4.2002

Works about Häll, Harri

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