I think (from reading another post on this subject) that at least two people have a copy of this article. I'll try to find that post (it is somewhere deep in these posts).
The public domain 'can' be 70 years, but it isn't automatically 70. A work in 1958 would have had to be renewed 28 years later or would become public domain. I am not sure, but I don't think this journal lasted that long.
http://en.wikipedia.org/wiki/Public_domainExamples:
"In the United States, Frank Capra's classic film, It's a Wonderful Life (1946) entered into the public domain in 1974, because someone inadvertently failed to file a copyright renewal application with the Copyright Office during the 28th year after the film's release or publication."
and
"Currently four shorts by the Three Stooges are in the public domain due to accidental failure to renew their copyrights in the 60s. These are Disorder in the Court, Brideless Groom, Malice in the Palace, and Sing a Song of Six Pants."
Doesn't really matter if it is public domain or not. I am going to contact another library and see if I can order a copy of this article and post a copy of it for everyone.