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. 1925 Apr 4;1(3353):656. doi: 10.1136/bmj.1.3353.656

OESOPHAGOSCOPY: A MEANS OF DETECTING FOREIGN BODIES NON-OPAQUE TO X RAYS

PMCID: PMC2226432 PMID: 20771997

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on p.656

Fig. 2
on p.656

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