Letter in Reply to Dr. Collins, on the Duration of Labour as a Cause of Danger and Mortality to the Mother and InfantProv Med Surg J 1848; s1-12 doi: https://doi.org/10.1136/bmj.s1-12.22.601 (Published 01 November 1848) Cite this as: Prov Med Surg J 1848;s1-12:601
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