Tetrahedron: Two Triangles into Tetrahedron: 1 + 1 = 4

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Index Entry

Mexico 63, pp. 23, 32, 10 Oct'63

Doxiadis Ltrs, U or 0, pp. 312, 313, 20 Jun'66

NASA Speech, pp. 52-55, Jun'66

Ledgmont Lab, pp. 17-18, 15 Oct'64

Oregon Lecture #1, p.34, 1 Jul'62

Oregon Lecture #4, p. 142, 6 Jul'62