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3Argitaratua 1966“...QC 994.9 .E96 1966...”
Conference Proceeding Liburua -
4nork Schueren, A. van der“...QC 911.82 .A6 .S385 1959...”
Argitaratua 1959
Conference Proceeding Liburua -
5Argitaratua 1963“...QC 971.7 .A6 .E96...”
Conference Proceeding Liburua -
6Argitaratua 1962“...QC 911.82 .A6 .E96...”
Conference Proceeding Liburua