TY - RPRT TI - Comparison of radiogenic helium and lead in zircon AU - Patrick M. Hurley AU - E. S. Larsen AU - David Gottfried PY - 1956 DO - 10.1016/0016-7037(56)90060-6 UR - https://pubs.usgs.gov/publication/70216326 ID - 70216326 ER -