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Title: Logynon pregnancy calculator, circular volvelle ready reckon [Go to resource]
Description: Logynon pregnancy calculator, circular volvelle ready reckoner, mounted on plastic presentation box dated February 1984 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: ready reckoner (pregnancy) Temporal: 1984 Source: Science Museum Creator: Schering Pharmaceuticals Identifier: 1989-820 Go to resource More Like this...
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