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2. Adachi I (1973) Collapse of ‘Village’ and Human (‘Mura’ to Ningen no Hokai). San’ichi Publishing (in Japanese)
3. The Basic Research Committee for Kamitsue Village Development Project (1977) Report on the basic research of development project of Kamitsue Village, Oita Prefecture (Oita-ken Kamitsue-mura Shinko Keikaku Kiso Chosa Hokokusho), Kamitsue Village (in Japanese)
4. Bell M (1980) Past mobility and spatial preference for migration in East Africa. In: White PE, Woods RI (eds) The geographical impact of migration. Longman, pp 84–107
5. Clout HD (1972) Rural geography: an introductory survey. Pergamon Press