This issue has variants.
The on-sale date is the publication date reported in the U. S. Copyright Office filing.
An earlier indexer provided an on-sale date of April 13. No citation was given, although another indexer notes that it matches a listing in the fanzine The Comics Reader.
Marvel Comics Index #8A lists Gaspar Saladino as letterer.
The Madbomb Part 7.
Letters from Ed Via, Gary Bromberg, Mark Zutkoff, Young Smith