[This Page(shadowhelix)][1] lists some sources. Some are german, some are english.

I also found [this][2] fanmade german pdf with a rather impressive overhaul on the UNL for the 60s. It might give you some inspiration to fill some gaps.

Some sources are found only in german as the german publisher(Pegasus) adds much content specific for the ADL as a bonus.

  [1]: http://shadowhelix.pegasus.de/UNL
  [2]: http://www.dystopic.de/files/lote_RC3.pdf