The Harper's magazine has a website where you can search past issues for free (but then have to pay to read the articles).
These is a tag system, and "Murmansk" is one of the available tages. There is only one article, in the August 1943 issue, written by Arthur Henry Timmins.
See:
http://harpers.org/blog/tag/murmansk/?yrf=&yrt=
And in one book, the above article is said as having been written by Dave Marlow:
"The English sailor and journalist
Dave Marlow described how the convoys were unloaded, even during raids, in an August 1943
article in Harper's Magazine: "Twenty-four hours a day they hauled and pulled, working twelve-hour shifts with no time off, working in a ...."
See:
https://www.google.fr/search?q=%22da...w=1536&bih=755