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APA Citation
Robertson, A. J., Anderson, J. M., Beck, J. S., Burnett, R. A., Howatson, S. R., Lee, F. D., Lessells, A. M., McLaren, K. M., Moss, S. M., & Simpson, J. G. (1989). observer variability in histopathological reporting of cervical biopsy specimens.. Journal of clinical pathology, 42(3), 231–238. http://access.bl.uk/ark:/81055/vdc_100135149836.0x000042