Unlike other L Miller superhero/sci-fi titles, Zombie is annoyingly undated. At least the other Miller titles give a copyright year if not the actual month so dating is possible.
These were important pre Alan Class reprint titles and introduced much American material to the UK that wouldn't have been seen otherwise.
#6 seems to be impossible to find a cover scan for! Does it exist? Also the same issue in the Voodoo title, no cover scans anywhere... (thanks to Dave D for bringing this to my attention).
Note: some PR issues may have no value. Selected issues in FN, VF or VF/NM may not exist in some titles.