They won't move at all, right?

Get a 1/2 lb ball-peen hammer. Tap the spaces between the lugs, rotating
and tapping as you go. You can tap hard if you like, so it's more like a
whack. Eventually you'll break up the rust that's gluing things together
and the drum will come off. If it now wiggles but still won't come off,
that's a different problem...

use the threaded holes in the drums. just start screwing bolts in
until it pops. that's what those holes are for!
                                      Chip

I had this problem on an Isuzu pickup and I eventually took it to a mechanic
because I could not get them off no matter how much I hit it with a hammer.
He used an air hammer until they broke loose.  Even then, he had to go to
town with that air hammer for a good 5 minutes before they would release.

Sid

my rear drums (98 civic cx) have 2 threaded holes, perfect size for2
LONG metric threaded bolts.

find 2, thread em in, itll push the drum right off.

Thanks to all. I guess I was going at it the right way, but without
enough ferocity.
I'll give them another whack....

And I didn't even consider the two bolt-holes.......never even gave
them a thought.

Again, many thanks...