Thanks to Tom Kovacs for the info and cover scans.
Blitz Verlag (German)
Grabratten - Die seltsamen Faelle des Detektivs Steve Harrison
Featuring:
"Graveyard Rats"
"People of the Serpent"
"Names in the Black Book"
http://howardworks.com/Grabratten-Blitz_Verlag.html
Fanucci Editore (Italian)
La Maschera di Cthulhu
Featuring: "The Children of the Night"
http://howardworks.com/La_Maschera_di_Cthulhu-FanucciEditore.html
Adventure House
The Magic Carpet Magazine Volume 3 Number 2 (Pulp Facsimile Reprint)
Featuring:
Letter to Magic Carpet Magazine, March 1933
"Congratulations on the quality . . ."
http://howardworks.com/magiccarpet-april1933-adventurehouse.html
Marvel Comics
The Savage Sword of Conan Volume 1 Number 12
Featuring:
"The Slave-Princess" (graphic adaptation)
"The Hyborian Age" (graphic adaptation)
http://howardworks.com/SavageSwordofConanV1N12-Marvel.html