In-line doorways alkin Kiatso probably provided ventilations [slides]  Picture Of Records 

 - U.S.A  Picture Of Records 
 - 1 Slide  Col.  ill  35mm. 
 - Picture Of Records Collection from U.S.A .
<br/><br/> IGNCA slides collection, cross reference Chaco Canyon Architecture from U.S.A 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Architecture-New Mexico(U.S.A)<br/>Chaco Canyon (New Mexico)<br/>Doorways (Chaco Canyon)
<br/><br/><label>Dewey Class. No.: </label>PR-CC  / 36