Niehaus Grevenkamp burial Ferdinand Indiana

I seek burial data of the cemetery Ferdinand, Dubois County, Indiana for the following persons:

- John Henry (Heinrich) Niehaus, born about 1814 in Damme?(I can not find), emigrated about 1834/1839
  died 24.Dec.1901 in Ferdinand, Dubois County, Indiana

married 1839 in Cumberland, Maryland ( I seek this record too) to:

- Anna Maria Agnes Grevenkamp, born 08.Oct.1813 in Damme, emigrated about 1838/1839
  died 13.Aug.1895 in Ferdinand, Dubois County, Indiana

- Hermann Ruhe, born about 1829 in Damme ?(I can not find), emigrated ?
  died 02.Jun.1902 in Ferdinand, Dubois County, Indiana

married in USA, where ?, to:

- Bernardine Rottinghaus, born 01.Jul.1834 in Damme, emigrated about 1854 ?
  died 03.May 1916 in Ferdinand, Dubois County, Indiana

How can I get a burial document of this Cementery ? The reason is,
I need the right date of birth and/or the parents and the marriage of: J.H. Niehaus(Niehus) and Hermann Ruhe

Can anybody help? Thank you,
Werner Honkomp

Good morning! Is there anything here that will help? There is also a
contact person.

http://home.att.net/~Local_History/Dubois-Co-IN.htm

Good luck,
Marilyn