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Uaxactun, Guatemala : excavations of 1931-1937
Elements for the formulation of terms of reference / Manuel Varas S.
Early Americana : catalogue americana vetustissima / Alexander Baer
Cultural and historical geography of southwest Guatemala / Prepared in cooperation with the United States Department of State as a project of the Interdepartmental Committee on Scientific and Cultural Cooperation
Cruz das Almas, a Brazilian village / by Donald Pierson, with the assistance of Levi Cruz [and others]
Archaeopteryx lithographica : a study based upon the British Museum specimen / by Sir Gavin De Beer