John, When you say obit for John, is this the one published in Longmont, Co? I see no other obits listed for the other members of this family.
In the Boulder County public records, I see no record of any death certificate recorded for any of these Munson's. Have you requested any death certificates? You need not know the yr. of death. And maybe 1904 is a little early for some counties. Boulder County has death records on file as early as 1880, the state as early as 1900. For $20.00 you can have the state search 1900-1925 for someone. Depends on $$ and certainty of death here. Frank