Analysis of information sources in references of the Wikipedia article "Karl Höltermann" in English language version.
{{cite book}}
: |work=
ignored (help){{cite book}}
: |work=
ignored (help){{cite book}}
: |author1=
has generic name (help); |work=
ignored (help){{cite book}}
: |work=
ignored (help){{cite book}}
: |work=
ignored (help)