Cesium and rubidium in 1974. Change class to I 28.139:974/prelim .
Description:
1 p. 4°
Notes:
(Mineral industry surveys.) [Annual, preliminary. Prepared in Division of Nonferrous Metals, Mineral Supply.]
Notes:
(Mineral industry surveys.) [Annual, preliminary. Prepared in Division of Nonferrous Metals, Mineral Supply.] + Distribution Made by Issuing Office. Mines Bureau, Pittsburgh, PA 15213
Availability:
+ Distribution Made by Issuing Office. Mines Bureau, Pittsburgh, PA 15213