Dark Horse Comics Aliens, vol.1 - issues 1-4

Aliens, vol.1, cover #1C - 3rd printing. 
Key issue- 1st appearance of Alien (Xenomorph) in standard sized comics. Release - May 1988

Aliens, vol.2, cover #2B - 2nd printing.
Release - Oct 1988

Aliens, vol.3, cover #3A - 1st printing 
Release - Nov 1988

Aliens, vol.4, cover #4A - 1st printing
Release - Mar 1989