World Health Organization & United nations Environment Programme. (1991). IPCS: Environmental health criteria 125 platinum. World Health Organization.
Lua i Stíl Chicago (17ú heag.)World Health Organization agus United nations Environment Programme. IPCS: Environmental Health Criteria 125 Platinum. Geneva: World Health Organization, 1991.
Lua MLA (8ú heag.)World Health Organization agus United nations Environment Programme. IPCS: Environmental Health Criteria 125 Platinum. World Health Organization, 1991.
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