Ghostly figure pictured in front of an old library shelf. (IMAGE)

PLOS

Ghostly figure pictured in front of an old library shelf.

Caption

Ghostly figure pictured in front of an old library shelf.

Credit

Willgard, Pixabay, CC0 (https://creativecommons.org/publicdomain/zero/1.0/)

Usage Restrictions

No restrictions.

License

CC0

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