ID:
2202
Maker's Name:
Drs C.G.F. Ampt, K.K. Keimpema
Where made:
Holland
Dimensions:
13.9 × 13.9 × 0.2 cm
Plastic circular rule for radioactive decay calculations. Instructions (in Dutch) on the back.
2202 - Radiologische rechenschijf (Dose Calculator)
