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16 März 1919 Jahr - commissioner of health invite international health board of rockefeller foundation to study hookworm
Beschreibung:
- plans were agreed for 5 year demonstration in contrrol of hookworm disease
Zugefügt zum Band der Zeit:
PR Medicine Timeline
By
Lauren Acosta
9 Apr 2021
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0
412
Datum:
16 März 1919 Jahr
Jetzt
~ 106 years ago
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