["Annual furrow images" simulating a cavern].
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Caves↗
Biomedical subjects
PIETRA
Publications and source records attributed to PIETRA.
[Rapid and economic procedure to build up a collection of negatives: solarization].
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Humans↗
[Epithelioma of the thoracic esophagus treated by resection and esophago-gastrostomy; presentation of a patient and radiography of the esophagus one month after intervention].
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Carcinoma↗