கேள்வி: ஏ. ஈ. டவுகிளாசு - தேர்ந்தெடுத்த பணிகள் என்பது என்ன?
பதில்: Douglass, A.E. (1944) "Tabulation of Dates for Bluff Ruin" Tree-Ring Bulletin Vol. 9, No. 2 (1941) "Age of Forestdale Ruins Excavated in 1939" Tree-Ring Bulletin Vol. 8, No. 2 (1940) "Tree-Ring Dates from the Forestdale Valley, East-Central Arizona" Tree-Ring Bulletin Vol.7, No. 2 (1921) "Dating Our Prehistoric Ruins: How Growth Rings in Timbers Aid in Establishing the Relative Ages in Ruined Pueblos of the Southwest" Natural History Vol. 21, No. 2