Double Torus · reference 421 of 432

Reference 421 — to paper 421

This is a reference only — the reverse fold of paper 421.

• Paper root — 25a3235e-150a-83a0-9bf9-c1c27b5609e2
• Reference root — 6d457b5c-3f6f-8230-83d5-176a9c40de3b

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