Notes:
Data source is the 1971 self published book by Richard Glenn Huffman [deceased], "George Muma Genealogy".
Per his death certificate, he was single and died of accidental discharge of dynamite
[Jefferson City, Missouri, Post-Tribune, Wednesday, May, 17, 1933:]
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DYNAMITE DEATH IS BELIEVED ACCIDENTAL
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KENNETT, Mo., May 17 --(AP)--
When friends discounted a suicide theory, a coroner's jury held the dynamite death of Martin Van Buren Mumma, Jr., 20, was accidental. Mumma, son of a Gideon, Mo., merchant, was killed Monday night when dynaminte he was carrying exploded.