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| View Original: | Keuffel & Esser, Prototype Rule for Estimating Fetal Head Circumference on X-ray Film - MIT Slide Rule Collection - DSC03586.JPG (5472x3648) | |||
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| Keywords: Keuffel & Esser, Prototype Rule for Estimating Fetal Head Circumference on X-ray Film - MIT Slide Rule Collection - DSC03586.JPG en MIT Slide Rule Collection MIT Museum Cambridge Massachusetts USA The museum permitted photography without restriction 2013-08-04 13 28 34 own Daderot cc-zero MIT Slide Rule Collection Uploaded with UploadWizard | ||||
