| 423 / | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
| 579 | DF | OXYGEN OR COMPOUND THEREOF {4} |
| 592 | DF | .~ Metal containing {12} |
| 635 | DF | .~.~ Alkaline earth metal (Mg, Ca, Sr, or Ba) {1} |
| 636 | DF | .~.~.~ Process of manufacturing {4} |
| 638 | | .~.~.~.~ By reacting a sulfur containing compound |