721
Ga : organogallium compounds. Pt. 1 : system number 36.
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...CBA - Gmelin handbook...
722
W : tungsten. Supplement vol. A7. Metal, chemical reactions with inorganic and organic compounds : system number 54 /
Book
...CBA - Gmelin handbook...
723
F : fluorine. Supplement vol. 5. Compouns with nitrogen : system number 5.
Book
...CBA - Gmelin handbook...