1. Fujiwhara, S.: Relations among “Omiwatari”, sunspots and rich and poor harvests. Geophys. Mag. Tokyo25, in press (1954).
2. —: Periodic change of climatic elements relating to the oscilation of the Earth's axis. J. Met. Soc. Japan, (1),31, 11 (1912).
3. —: Notes on the climatic variations concluded from the dates of the first complete freezing of Lake Suwa in Japan. Geograf. Ann.3, 358 (1921).
4. Tanaka, A.: Studies on Lake Suwa, Part I. Iwanami Book Co. 1918 (in Japanese), 936 pages.
5. Yamazawa, K.: Japanese Climatic Chronology, Sumii Book Co. 1936 (in Japanese), 64 pages.