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 National Ranching Heritage Center:

"

The center was established in 1969 by the Ranching Heritage Association.[1] Its first director was the historian and archaeologist William Curry Holden From 1977 to 1980, Jim Humphreys, who managed the Pitchfork Ranch in Dickens and King counties from 1965 to 1986, was the board chairman. Until 1999, the NRHC was a part of the Museum of Texas Tech University, to which it is adjacently located.