Sent you a PM. I have done dozens of trees. Do not believe hints, evaluate. Do NOT believe trees you see online. Someone makes a guess, wrongly and everyone else then copies it. Always try to get a document to verify. I would be happy to help you. If you are looking at Missouri data, noticing you have St Louis, it is hard as not as much is available as for some other states. But death certs are all at
Attention Required!
for 1910 to 71
Digital newspapers start page is
Missouri Digital Newspaper Project | The State Historical Society of Missouri
and the library of congress has others
Search U.S. Newspaper Directory, 1690-Present << Chronicling America << Library of Congress
Familysearch.org is excellent as well although their search function can be a challenge