The ghostly radio station that no one claims to run - BBC Future
7 Ghost-Hunting Tools Recommended by Paranormal Investigators | Mental Floss
An introduction to ghost imaging: quantum and classical | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Flatbed scanners capture forgotten slides
How to Be a Vintage Ghost Hunter | The Haunted Walk
The Broken Technology of Ghost Hunting - The Atlantic
Paranormal Technology: Gadgets For Ghost-Tracking : NPR