How to get the world at war zombie maps for black ops?

der rise

nacht der untoten

zombie verruckt

shi no numa



how do i get these on black ops?

is there a code?How to get the world at war zombie maps for black ops?
if you pre-ordered black ops you got all original maps



now theres a new dlc called rezzurection that has all original maps and a new map for 1200msp or $12How to get the world at war zombie maps for black ops?
Buy the newest map pack that has moon and You will get those maps.How to get the world at war zombie maps for black ops?
Also when you get rezurrection you get the new zombies epic (really awesome map) MOON!!!!