|Courtesy: Missouri Digital Heritage website|
You can search both pre- and post -1910 birth and death certificates. It's awesome, really. A brilliantly clear copy of the original certificate will be available to download as a PDF. The Missouri death records were quite detailed around 1910 and yield an abundance of information.
This was my first foray into any Missouri records, in the course of my genealogical research.
After searching for some hours on Ancestry.com and FamilySearch.org with zero results for death records for my particular family, I had come to believe that perhaps many of Missouri vital records had not been digitized, or were somehow lost. The Missouri Digital Heritage pages proved far more fruitful!
Visit, and have enjoy.
P.S. I wish to give credit where credit is due: I would not have found this great resource, had I not been viewing a memorial page on FindAGrave.com that cited these archives as the source of the information contained there. So...thank you to the author who correctly included a citation for the biographical info on their page.