Protected areas: centres for propagating a general nature conservation policy : colloquy organised by the Council of Europe and the management of the Abruzzi National Park (Italy) 8-10 June 1977 - Hunkeler, Pierre; Council of Europe (Environmental encounters series, 1998)
Keywords: luonnonsuojelu; matkailu; maatalous; metsästys; kalastus; kestävä kehitys