Construction stages Chetro Ketl by Florence M. Hawley Plate XII (1934)
Florence M. Hawley
Plate XII from <i>The significance of the dated prehistory of Chetro Ketl, Chaco Caänon, New Mexico</i>. University of New Mexico Press. OCLC 328211. Located at: <a rel="nofollow" class="external text" href="http://128.121.13.244/awweb/main.jsp?flag=browse&amp;smd=1&amp;awdid=1">New York State Library</a>