How to go about reading all of Ray Bradbury

A couple of years ago I read The Illustrated Man and fell in love with Ray Bradbury's style of writing. Since then I have read 10 of his novels/short story collections. I am a completionist when it comes to authors I enjoy and I would like to some day read everything that Ray Bradbury wrote.

The issue that I am running into is I don't know the best way to get all of his short stories. It looks like many of them were not originally written in collections but were gathered together later on. I'm also seeing that many short stories are in multiple collections or have different versions in different collections. It looks like there was a project at some point to release all of his short stories in chronological order but it was never completed.

Does anyone have a definitive list of print books I can purchase/borrow to get all of these stories? I would like to minimize duplicates if possible. I already own The Library of America Ray Bradbury collection but that really only includes his major novels/collections. I also own Sing the Body Electric, Death is a Lonely Business, Farewell Summer, and The Halloween Tree.

Any help would be appreciated!