This issue has variants.
Credits updated by Nick Caputo, Feb 2011. Brown pencils and Cockrum inks credits are in The Marvel Comics Index (Olshevsky 1981) and Official Index to the Marvel Universe (Jensen et al. 2011); these are also sources for letters credit.
Source for Saladino letters credit is The Marvel Comics Index (Olshevsky 1981).
Letters from Larry Dean, Bob Hobart, Steve Andrews, David Lynch; Marvel Value Stamp Series B #30.