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2. Studies on the variability of the landlocked Ayu-fish Plecoglossus altiveris T. ET S., in Lake Biwa; I. On the mode of distribution and some body form variation at early phases of development;Japanese journal of ecology,1970
3. Studies on the variability of the landlocked Ayu-fish Plecoglossus altiveris T. ET S., in Lake Biwa; II. On the segregation of population and the variation in each population;Japanese journal of ecology,1973
4. Studies on the variability of the landlocked Ayu-fish Plecoglossus altiveris T. ET S., in Lake Biwa; IV. Considerations on the grouping and features of variability;Japanese journal of ecology,1973
5. Studies on the variability of the landlocked Ayu-fish Plecoglossus altiveris T. ET S., in Lake Biwa; III. On the differences in the process of maturation, spawning habits, and some morphological features of each population;Japanese journal of ecology,1973