Double Torus · reference 21 of 432

Reference 21 — to paper 21

This is a reference only — the reverse fold of paper 21.

• Paper root — 934dc62b-d0af-8ccb-8c1a-8b129c8ae68d
• Reference root — 3b9ce279-cda5-8022-bf2a-61a830793fee

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