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Jacobus Klaas Hammer
Dutch scouting leader and esperantist
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Jacobus Klaas Hammer is in following lists
By field of work
Notable Dutch people in literature
Gender:
Male
,
Born in:
Years 1900 to 1929
By work and/or country
Notable Dutch Esperantists
Gender:
Male
,
Born in:
Years 1900 to 1929
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