"Albret Blevinson" is a conglomeration of the names of comic book artists Al Williamson and Bret Blevins. They were the co-embellishers of a two-part tale by Walter Simonson and pencilled by "Our Pal" Sal Buscema which involved the threat of the Zaniac, and introduced to the Marvel Universe proper Justice Peace, who would later appear in Uncle Walt's Fantastic Four adventures.
The issue numbers are The Mighty Thor #s 371 and 372.