I have in hane a copy of my Grandfather's "Certificate of
Naturalization".

I am attempting to find his Mother's maiden name, but it is not on
this document. I believe that the actual filing certificate and
associated paperwork would have this. Is this correct?

There is a certificate number, a Petition number, and volume number on
the document. It was issued Albany, Albany County, NY, in 1920.

What is easiet route to get the filing paperwork asssociated with
this?

If I am asking a "basic" question, please indulge me. I am still new
to this.

Howie Axelrod