An in-situ permeable reactive barrier for the treatment of hexavalent chromium and trichloroethylene in ground water /

"Project Officer, Robert W. Puls, Subsurface Protection and Remediation Division."

The ethics of the dust; ten lectures to little housewives on the elements of crystallization,

The valley of diamonds.--The pyramid builders.--The crystal life.--The crystal orders.--Crystal virtues.--Crystal quarrels.--Home virtues.--Crystal caprice.--Crystal sorrows.--The crystal rest.--Notes.