-[1] [CITE@ja[科学と技術の諸相]]
([[Nobuo YOSHIDA]]著, [TIME[2020-06-27 00:00:00 +09:00]])
<http://www005.upp.so-net.ne.jp/yoshida_n/index.htm>
-- 消滅確認  [TIME[2021-01-29T06:42:01.800Z]]
-- [CITE[Wayback Machine]], [TIME[2021-01-29T06:41:51.000Z]] <https://web.archive.org/web/20030202125341/http://www005.upp.so-net.ne.jp/yoshida_n/index.htm>