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. 2021 Jul 28;9(8):176. doi: 10.3390/toxics9080176

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The timeline of the keywords appears in the scientific documents published in the field of industrial effluent and sludge toxicity from 1950 to 2020 via the utilization of CiteSpace software.