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 February 8. No citation was given, although other indexers speculate that it may come from a listing in the fanzine The Comics Reader.
Verpoorten and Crespi credits per Nick Caputo, August 2012. Marvel Comics Index #8A lists Frank Giacoia as inker and Gaspar Saladino as letterer.
Giacoia inks on story pages 1-3,5,8,15-16; remainder inked by John Verpoorten. Info per Nick Caputo, August 2012.
Letters from readers Bob Fitschen, Charlie Cockett, Mitch Paul, Keith Floyd, Don Jacobson, Robert Konior