The on-sale date is the publication date reported in the U. S. Copyright Office filings.
The third panel on page 17 was redrawn by Steve Ditko. Ditko info by Bob Bailey, 2005-03-19 (Per Sandell ed.)
Letters of comment from James Maupin; Anonymous; Wayne Shepard; Richard Cohen; Mark Gruenwald (as Fantastic Four Fan Club secretary); Dana Riell; Karl Spence; John Furek; Don Keefer; Kevin Shields; and George R. Martin.
Per the author of the fantasy series Game of Thrones, George R. R. Martin, his fan letter here was his first published work (as per interview given on 14 July 2012 on the G4 cable network show, Comic-Con Live),