言及状況
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Almost forgot to include links to the scans of Ifa's book Ko Ryūkyū as available from @NDLJP. Here they are:
1911 ed.: https://t.co/9bqAWY4riG
1916 ed.: https://t.co/vFZ4guREaM
1922 ed.: https://t.co/BAe4RcZtRc
1942 ed.: https://t.co/ZWc4VKZ4C3 6/