This is Mystery in Space 11, published by Mimosa (SA Magazine Co) +/- 1964.
It reprints the cover and both stories from DC Comics' Classic Mystery in Space 82 (1963):
"World War on Earth and Rann!"
"The Planet Patrol Peril!"
Also reprinted is this story from DC Comics' Mystery in Space 44 (1958):
"Earthman, Go Home!"
32 pages, full-colour, glossy cover and black-and-white interior pages.
Here is the cover of issue 11 and DC Comics' original cover:
Mimosa Mystery in Space Series