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![Cover for Guofeng Zhang · The Effect Evaluation of Haze Governance Policies in Hebei Province–Based on I-O Model (Pocketbok) [2020 edition] (2021)](https://imusic.b-cdn.net/images/item/original/592/9789811537592.jpg?guofeng-zhang-2021-the-effect-evaluation-of-haze-governance-policies-in-hebei-province-based-on-i-o-model-pocketbok&class=scaled&v=1613848601)
![Cover for Guofeng Zhang · The Effect Evaluation of Haze Governance Policies in Hebei Province–Based on I-O Model (Inbunden Bok) [2020 edition] (2020)](https://imusic.b-cdn.net/images/item/original/561/9789811537561.jpg?guofeng-zhang-2020-the-effect-evaluation-of-haze-governance-policies-in-hebei-province-based-on-i-o-model-inbunden-bok&class=scaled&v=1605100543)
![Cover for Guofeng Zhang · Environmental and Social-economic Impacts of Sewage Sludge Treatment: The Evidence of Beijing - SpringerBriefs in Economics (Pocketbok) [1st ed. 2016 edition] (2015)](https://imusic.b-cdn.net/images/item/original/479/9789812879479.jpg?guofeng-zhang-2015-environmental-and-social-economic-impacts-of-sewage-sludge-treatment-the-evidence-of-beijing-springerbriefs-in-economics-pocketbok&class=scaled&v=1605103439)