Mars and Martians. We recently referred to Mars here and here. Blog readers might notice that I am unfamiliar with some more recent versions, e.g., Moving Mars, the Mars Trilogy and The Martian. Comments and comparisons would be welcome.
Ray Bradbury's Mars stories divide into:
those included in The Martian Chronicles;
those not included;
one that has been in some editions but not in others (see Comments here).
However, it seems that all have now been gathered together. See here.
Science fiction is collaborative. It makes sense to compare Anderson's own versions of Mars and Martians, then to extend the discussion to cover all Martian fiction which is an extremely large subject.
For James Blish's Mars, see here.
For ERB's, see here.