Commentary by Chris Pressey

This work is distributed under a CC-BY-ND-4.0 license, with the following explicit exception: the ratings may be freely used for any purpose with no limitations.

4-Dimensional Space

Strange Horizons - Spirits, Art, and the Fourth Dimension By Bryan Clair

• rating: 3

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Notes on the Fourth Dimension -- The Public Domain Review

• rating: 3

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Acme Klein Bottle

• rating: 1

I'm impressed that this site is still up in 2024.