Walter Maxwell wrote:

Hasn't the copyright expired on material published in 1937?

Hm. The way I read http://www.copyright.gov/circs/circ1.html#hlc, it
has. It looks to me like the original copyright was good for 28 years
and for copyrights originally issued in 1937, renewal (if done) was good
for another 28. That would put it in the public domain after 1993. I'd
sure appreciate comments from someone who's actually familiar with the
law -- it's pretty convoluted and I'm not at all confident about my
interpretation.

Roy Lewallen, W7EL