TY - RPRT TI - Pb Isotopic Systematics of Lunar Highland Rocks (>3.9 Ga): Constraints on Early Lunar Evolution AU - Wayne R. Premo AU - M. Tatsumoto AU - Keiji Misawa AU - N. Nakamura AU - N. Kita PY - 1999 UR - https://pubs.usgs.gov/publication/70209612 ID - 70209612 ER -