Both of those books are so old I don't think anybody would
mind. The International Nickel Company was sucked into
Inco, so it technically doesn't exist anymore.
I think as long as you cite where the info comes from, there
should be no problem. It is always better to cover yourself
when it comes to legal matters. It isn't like the people that
copy stuff like that and sell it on Ebay.
I have a large library of precious metal books also.
I will make a list and post it tomorrow if anybody knows of
a good book to add to my list, I would appreciate any info.
And if anybody has any questions on any of the books I have
just ask.