To look for a paper/publication/book, there is one definitive solution, succesful in 99.9999999% of cases:
- ask the librarians.
Maybe you do not want to contact librarians, because you cannot phone them, you cannot write an email, you cannot visit a library, so you are left with performing these 3 steps:
- look in the library.
- ask the librarians.
- ask researchers who cited it (if you can ask other researchers around the world, you should have first contacted a librarian, anywhere in the world).
But it must be stressed that 2) is the solution in 99.9999999% of the cases, because... if you have an issue with your eye, do you google it or do you make an appointment with an ophthalmologist?
An iterative google search may help you, for example searching part of the title, not the complete title and reference, pinpointing which library has the required object in their catalog. However you may still have to contact the library having the desired publication... therefore you save time by asking the librarian and completely skipping the multiple google research, plus the outcome is most likely to be successful (by asking the librarians).