Double Torus · reference 427 of 432

Reference 427 — to paper 427

This is a reference only — the reverse fold of paper 427.

• Paper root — ff0649e4-5052-8b60-a3c0-9e32b107ca57
• Reference root — 97a1ff5b-efbd-8f2c-bc40-49baea43bf13

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