Hein, O. (1977). Graphentheorie für Anwender. Bibliogr. Inst.
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Tohutoru Kātū Chicago (17th ed.)
Hein, Olaf. Graphentheorie Für Anwender. Mannheim, Wien, Zürich: Bibliogr. Inst, 1977.
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Tohutoro MLA (9th ed.)
Hein, Olaf. Graphentheorie Für Anwender. Bibliogr. Inst, 1977.
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Kua rahua te tārua ki te papatopenga
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