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Josef Trajber
De Toverdobbelsteen (book)A Dutch book on the 3x3x3 Rubiks cube.
Der WürfelGerman. This version says "Lösungswege" under the title.
Der WürfelLösungswege mathematische grundlagen varianten für supertüftler.

Rubik's ClockDie schnellste Loesung und zahllose Varianten

Trajber's OctahedronOf this 3x3x3-variant only few examples were produced and sold in the eighties.

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