Prit letters on electronic letterhead DOCUMENT

Hello,

Is there a way to do the following?

I have an electronic Word Document which is letterhead.

I have a Word document that is 48 letters that are pages within a document separated by page breaks.

Is there a way to use the two together so that when I print them, the letters are merged into the letterhead? I’m trying to print the letters on electronic letterhead without cutting and pasting each one and printing one at a time.

Greg