TY - GEN AU - Strong,William Duncan AU - Evans,Clifford TI - Cultural stratigraphy in the VirĂº valley northern Peru. The formative and florescent epochs T2 - Columbia studies in archeology and ethnology. ; U1 - 930.1 21 PY - 1952/// CY - New York : PB - Columbia univesity press, N1 - Posee tapa dura ER -