Does anyone know who keeps the records for Prospect Cemetery in Greene County, Missouri?

I would like to write to them to find out more about
Willie S BARROW 1866 -1930
Rebecca J Barrow 1877 - 1959
Sam Barrow 1912-1933
Nellie Barrow Boswell 1900 - 1937.

Nellie Barrow was married to Cecil BOSWELL (1905-?), son of Wilson Harrison Boswell.

Thanks,
Karen