In the 1950s, archaeologists of the Carnegie Institution, including A. L. Smith, Robert Smith, Tatiana Proskouriakoff, Edwin Shook, Karl Ruppert and J. Eric Thompson conducted five years of intensive archeological investigations at Mayapan. Their work was published in a mimeographed series of "Current Reports". The "Current Reports" have recently been republished in their entirety by the University of Colorado Press (John Weeks 2009). The final report was published by the Carnegie Institution as "Mayapan, Yucatan, Mexico", by H. E. D. Pollock, Ralph L. Roys, A. L. Smith, and Tatiana Proskouriakoff (1962, Publication 619). Robert Smith published a two-volume monograph on "The Pottery of Mayapan" in 1971 (Papers of the Peabody Museum of Archaeology and Ethnology 66, Harvard University).