Analysis of information sources in references of the Wikipedia article "Γιούργκεν Χέννιγκ" in Greek language version.
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ignored (|volume=
suggested) (βοήθεια); Unknown parameter |Sammelwerk=
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suggested) (βοήθεια); Unknown parameter |Nummer=
ignored (|number=
suggested) (βοήθεια)|Band=
ignored (|volume=
suggested) (βοήθεια); Unknown parameter |Sammelwerk=
ignored (|work=
suggested) (βοήθεια)|Band=
ignored (|volume=
suggested) (βοήθεια); Unknown parameter |Sammelwerk=
ignored (|work=
suggested) (βοήθεια)