One of the most useful features of my website is the Ray Bradbury Short Story Finder. It lets you find out which books contain any given story, and where each story made its first appearance.
I've just done an update - adding some missing (albeit obscure) late-career Bradbury books, including Summer Morning, Summer Night.
And I've extended the "Eller References" This is the unique numbering system devised by bibliographer/biographer Jonathan R. Eller: each story receives a two-part numeric code, where the first part denotes the year of first publication, and the second part indicates the publishing sequence within the year. Eller's system is used systematically in the book Ray Bradbury: The Life of Fiction, and several years ago Jon very kindly gave his permission for me to use the same system here. What I've added today is some additional Eller References which extend beyond The Life of Fiction.
I hope you continue to find the Short Story Finder useful!