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1Argitaratua 1990“...QC 881.2 .M53 .N02972...”
Conference Proceeding Liburua -
2Argitaratua 1978“...QC 981.8 .C5 .C6399...”
Conference Proceeding Liburua -
3Argitaratua 1996“...QC 884.2 .C5 .S989...”
Conference Proceeding Liburua -
4Argitaratua 1997“...QC 982.5 .S7 .I61 1997...”
Conference Proceeding Liburua