Gestation calculator used by field workers in the Institute for Social Studies in Medical Care
Gestation calculator used by field workers in the Institute for Social Studies in Medical Care, health survey entitled `How many children?', 1976.
- Materials:
- plastic (unidentified)
- Object Number:
- 1993-1391/1
- type:
- calculator
- Image ©
- The Board of Trustees of the Science Museum