Sgt. Kirk #4, October 1967
What you are seeing above is the table of contents of Sgt. Kirk magazine #4. On it, "Sgt. Kirk" is by Hugo Pratt, "Randall" is by Arturo del Castillo and "Ernie Pike" is by Hugo Pratt also. Héctor Germán Oesterheld's name is nowhere to be seen as you can also confirm below.
Sgt. Kirk #4, October 1967
We all know this, there's no need to beat the dead horse. What is new to me is that almost sixty years later there are Italians like Claudio de Nisco
here whitewashing the situation on behalf of the sacred cow. Here's what he wrote all over the
Sgt. Kirk issues at the GCD: "Héctor Germán Oesterheld (credited as Hector. G. Oesterheld)." I corrected the situation until issue #30, but, since that's as far as I can go and not wanting to be like him, consider yourselves warned, dear readers!
PS A last comment: in this very issue Carlo della Corte "presents" Ernie Pike. Not once is Héctor Germán Oesterheld mentioned, obviously. With infinite cynicism he even says that the face of Ernie Pike is the face of a friend of Hugo Pratt. A friend, who, according to him, got involuntarily involved in Pratt's saga!