机构:
VIRGINIA POLYTECH INST & STATE UNIV, DEPT GEOL SCI, BLACKSBURG, VA 24061 USAVIRGINIA POLYTECH INST & STATE UNIV, DEPT GEOL SCI, BLACKSBURG, VA 24061 USA
机构:
VIRGINIA POLYTECH INST & STATE UNIV, DEPT GEOL SCI, BLACKSBURG, VA 24061 USAVIRGINIA POLYTECH INST & STATE UNIV, DEPT GEOL SCI, BLACKSBURG, VA 24061 USA