[1] 中国共産党革命根拠地 - Wikipedia (2020-04-04 15:20:23 +09:00) https://ja.wikipedia.org/wiki/%E4%B8%AD%E5%9B%BD%E5%85%B1%E7%94%A3%E5%85%9A%E9%9D%A9%E5%91%BD%E6%A0%B9%E6%8B%A0%E5%9C%B0
[2] 陝甘寧辺区 - Wikipedia (2020-04-14 04:44:26 +09:00) https://ja.wikipedia.org/wiki/%E9%99%9D%E7%94%98%E5%AF%A7%E8%BE%BA%E5%8C%BA