sod carb is used in all sorts of b&w paper developers.

Dektol 1l stock solution - diluted between 1:1 and 1:4 - from memory - is about:

3g metol (or 0.3g phenidone) , 45g sodium sulfite, 12g hydroquinone, 70g Sodium Carbonate, and then 2 -4 g of Potassium Bromide.