The Midwest Historical and Genealogical Society indicates that the records of the Mueller Mortuary are located at the Wichita Public Library. (
http://skyways.lib.ks.us/genweb/mhgs/undertakers.htm). A record from the Maple Grove Cemetery for William Julius Dorner, born 1918, d. 2 Nov 1918 indicates that the burial was handled by Mueller Mortuary. The internment date was 6 Nov. 1918.
Could anyone locate and copy the mortuary record for me? I am more than happy to reimburse you for the cost.