Where to write for records

You all have been so helpful that I'm back to ask another favor. I've been sent the genealogy of (hopefully) my great-great-grandfather, Johan Heinrich Bohne from Mr. Stegman. I am very grateful to him for his time and trouble.

Now, I'd like to get the address in Gesmold, Hannover, Germany where I have to write to get other records, and to find out, if indeed, this is my great-great-grandfather. It just seems too easy after all the years I've been searching to get this information so easily.

I'm not accomplished in genealogy research, so I don't know where to get to pursue vital records.

Thank you all so much!

Virginia Knipper