Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Columbia, Maryland:

"

There are four historic National Register of Historic Places sites in Columbia: Christ Church Guilford, Dorsey Hall, Woodlawn, and the Oakland Mills Blacksmith House and Shop. Most historic buildings, mills and plantations within Columbia that qualified for the register, such as Oakland Manor,[1] were not submitted by Rouse company affiliates.[citation needed]