Sigman, H. Cross-media pollution: Responses to restrictions on chlorinated solvent releases. Land economics..
Čikaški stil citiranja (17. izdanje)Sigman, Hilary. "Cross-media Pollution: Responses to Restrictions on Chlorinated Solvent Releases." Land Economics. .
MLA način citiranja (9. izdanje)Sigman, Hilary. "Cross-media Pollution: Responses to Restrictions on Chlorinated Solvent Releases." Land Economics., .
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