Piedras Negras Archaeology: Architecture. Linton SatterthwaiteJr. (University Museum, University of Pennsylvania reports. Four reports separately bound titled as follows: Part I, No. 1, Introduction, 1943; Part II, Temples, No. 1, 1944; Part IV, Ball Courts, Nos. 1, 2 and 3, 1944; Part VI, Unclassified Buildings and Substructures, Nos. 1 and 2,1944.)