* At Mesa Verde National Park, the Wetherill Mesa Archeological Project is completed, with excavation of three cliff dwellings ( Long House, Mug House, and Step House ), including a survey of Wetherill Mesa and excavation of selected mesa-top sites ( begun in 1959 ).
* At Mesa Verde National Park, the Wetherill Mesa Archeological Project begins for excavation of three cliff dwellings ( Long House, Mug House, and Step House ), including a survey of Wetherill Mesa and excavation of selected mesa-top sites ( completed in 1972 ).
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