Page 21 of the DCC rulebook:
0-level demi-humans are able to utilize select racial traits as follows: dwarves have infravision and a base speed of 20’; elves are sensitive to iron and have heightened senses; and halflings have infravision. Refer to the dwarf, elf, and halfling class descriptions for more information on these abilities.
I extrapolated on the remaining racial abilities in the class descriptions, adding what made sense and would naturally be a racial feature as opposed to something a character might learn while being trained in a class.
Things I added to my game/the sheet:
Elf: Immune to magical sleep/paralysis and infravision. Immunity seems like something inherent and infravision because all the other races get it at 0-level.
Dwarf: Smell gold/gems. Again, seems like an inherent ability a dwarf would possess for most of their life.
Halfling: Two-weapon fighting and good luck charm. I could see an argument for not including two-weapon fighting, but I saw it as more of how halflings are raised/wired and that perhaps halflings simply do not favor one hand or the other which in turn makes them naturally good at using either. Again, good luck charm just seems like something halflings would always possess/couldn't get away from.
Ultimately, I felt the paragraph on page 21 was not a complete list (see Elf infravision, no mention of halfling's 20' move) and just sort of went with my gut/house-ruled it.