Does anyone know the Rishi for each of the Vedas?

Who cognized the Rig Veda, the Sama Veda, the Atharva Veda, the Shukla Yajur Veda (was it Shukla) and the Krishna Yajur Veda (was it Krishna)?

I have gotten copies of the 4 fundamental Vedas and have them in my Windows Media Player only I don't know whom to list under the artist, in this case that would have to be the original cognizers I take it?

So, I am interested in finding this out once and for all, or at least one more time to help me eventually remember whom they are.

Any takers?

Thanks,

John