Yes, probably the whole thing is the right thing: "Oblastnoe Knigoizdatelstvo Stalingrad".
Because, there probably are another ones for other regional centers.
JMO, but (assuming I am reading it correctly) I'd think that the publisher is Областное Книгоиздательство (Oblastnoe Knigoizdatelstvo = Regional Book Publishing), and Stalingrad was the publisher's location.