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 Gertrude Caton Thompson:

"

Caton Thompson and Wight Gardner also worked on prehistoric sites at Kharga Oasis during three expeditions from 1930 to 1933. Caton Thompson had made her first visit there in 1928 during her expedition to the Zimbabwe excavations. Since the Kharga Scarp contained many Paleolithic sites, Caton Thompson was able to excavate many implements used by those civilizations using meticulous soil scrutiny and how she noted where objects were positioned in relation to each other. This approach revolutionised how archaeological sites were surveyed and studied.[11] The flints she bought back to London are permanently housed in the Institute of Archaeology in London.[citation needed]