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1Argitaratua 1974“...GB 2401 .I61 1973...”
Conference Proceeding Liburua -
2
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3Argitaratua 1987“...GB 2401.2 .W926...”
Conference Proceeding Liburua -
4Argitaratua 1978“...GB 2401.2 .S989 5th...”
Conference Proceeding Liburua