Obtaining the materials
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Equilateral felt triangles (in orange, red and green, with sides measuring 5 cms.) can be ordered from:
Rittel-Verlag
Frank Rittel
Meldorfer Str. 11 b
20251 Hamburg
Tel.: 040-414 253 16
www.rittel-verlag.de
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Equilateral wooden triangles (in yellow, orange and light green, with sides measuring 5 cms.) can be purchased from:
Erzgebirgische Holzspielwaren Ebert GmbH
Sorgauer Str. 1
09526 Olbernhau
www.holzspiel-ebert.de