| Book = Duczko 1984
| Title = Duczko, Wladyslaw (1984) 'Die Kugelnadel'
| Series = <section begin=Series />{{Ref Book|Book=Arwidsson 1984}}<section end=Series />
| Link =
}}<section end=Title />
<noinclude><section begin=Series /> Birka, Kungliga Vitterhets Historie och Antikvitets Akademien<section end=Series />
<includeonly>
<section begin=Short />{{Book