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APA Citation
Nicholson, G., & Baker, A. Z. (1940). eleven Years of Diphtheria Immunization in a Rural District. BMJ, 2(4158), 354–355. http://access.bl.uk/ark:/81055/vdc_100181461420.0x00000e
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Nicholson, G., & Baker, A. Z. (1940). eleven Years of Diphtheria Immunization in a Rural District. BMJ, 2(4158), 354–355. http://access.bl.uk/ark:/81055/vdc_100181461420.0x00000e