Here the ID-78 formula:

750 ml. water
50 grams Sodium sulfite anidro
62 grammi Sodium carbonate anidro
12 grammi Idrochinon
0.50 grammi Phenidone in 20 ml. alcool
*4.5 grammi Potassium Bromide

Diluition 1+1 water 1 minute developing time at 20 C.
Diluition 1+3 water 2 minutes tdeveloping time at 20 C.
* you can add until 10 grams of Potassium Bromide to increase warm tones
For all the lovers of warm tones paper developer here there is a tab in French with interesting paper developers.