Jack, I took another look at the Wikipedia article that you linked to claiming that Bach did not write "Toccata and Fugue in D minor," and noticed that at the top of the article, large red letters that read"

"We need your help documenting history."

This notation is posted when Wikipedia considers the following entry as questionable.

And scrolling down, one finds a box enclosing the following request:

"This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed."

Apparently Wikipedia considers the article "iffy"—and asks for verification of the assertions.

Don Firth