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use existing reference^[4]

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basic reference^[5]

group reference^{[group 1]}

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List of books about Wikipedia

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^ basic reference
^ [Ighhihihhi Ighhihihhi]. {{cite web}}: Check |url= value (help); Missing or empty |title= (help)
^ "Yahoo".
^ "yahoo".
^ basuc

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Add topic

[1] sic reference

[2] [Ighhihihhi Ighhihihhi]. {{cite web}}: Check |url= value (help); Missing or empty |title= (help)

[3] "Yahoo".

[:0-4] "yahoo".

[5] suc

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[group 1]

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