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APA Citation
O'Brien, A., Townsend, K., Hale, R., Sharley, D., & Pettigrove, V. (2016). how is ecosystem health defined and measured? A critical review of freshwater and estuarine studies. Ecological indicators, 69, 722–729. http://access.bl.uk/ark:/81055/vdc_100069036928.0x00002d