How many stars were on the US Flag in 1967?

Where is an appropriate internet site to research this information? I ask since my father passed away in 1967 and I am wanting to have a ceremony in his honor since I do not believe one was done after his passing. I am mainly looking at having a flag folding and 21-gun salute as I am my brothers and sisteeer were to young to know what happened if any funeral ceremony was ever done. Now I would like to see this done in the coming months as time is approaching for the date of his death.