Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Journal of the Faculty of Science, Hokkaido University. Series 6, Zoology >
Vol. 20 No. 3 >
Further Observations on Butterfly Phenology at Jozankei (Sapporo) : Comparisons of the Results in Two Successive Years (With 6 Text-figures and 3 Tables)
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