Hi Al! Are both sets yellow and black sticker backed versions of the Great Feats set? I think they may have issued them in packs and also in factory or traded sets - I thought this was only done for one year (1986 seems about right), but maybe that was in multiple years? Are the subjects listed in the sets completely different? Not sure why Fleer thought a drab yellow subset version of a nice colorful set they had previously issued was a good idea - to be honest, I've always resented this set a little bit!
