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APA Citation
Crowther, J. S., Drasar, B. S., Goddard, P., Hill, M. J., & Johnson, K. (1973). the effect of a chemically defined diet on the faecal flora and faecal steroid concentration. Gut, 14(10), 790–793. http://access.bl.uk/ark:/81055/vdc_100135551140.0x000049