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With DOI

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Jackson, J. J., & Samuel, T. S. (2001). The impact of climate change on sea levels. Journal of Environmental Science, 55(4), 233-277. doi:10.1070/8567-6582.33.5.888

Without DOI

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Jackson, J. J., & Samuel, T. S. (2001). The impact of climate change on sea levels. Journal of Environmental Science, 55(4), 233-277. Retrieved from http://environmental_science_journal.org