You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Sierra de Tamaulipas; region of Rancho Las Yucas, ca. 40 km NNW of Aldama; slopes of Cerro de Las Yucas Remove constraint Place: Sierra de Tamaulipas; region of Rancho Las Yucas, ca. 40 km NNW of Aldama; slopes of Cerro de Las Yucas