This issue does not contain a letter column. On-sale date from Amazing Heroes #87.
This issue is a variant of Alpha Flight (Marvel, 1983 series) #35 [Direct].
There exist further variants:
Attuma strengthens his hold over Atlantis, using Marrina as a pawn. Alpha Flight gathers and tries to figure out how to help Snowbird with her mysterious ailment. Shaman endures a mystic rite to regain his magic and gets a new costume and staff in the process.