1. Magono, C. and colleagues, 1959: Preliminary investigation on the growth of natural snow crystals by the use of observation points distributed vertically. J. Fac. Sci., Hokkaido Univ., Ser. VII, 1, 195-211.
2. Magono, C. and colleagues, 1960: Investigation on the growth of natural snow crystals by the use of observation points distributed vertically, II. I bid., 1, 267-282.
3. Magono, C., K. Higuchi, K. Orikasa, T. Takahashi, K. Kikuchi, T. Nakamura, T. Kimura and K. Sakurai, 1962: Investigation on the growth and distribution of natural snow crystals by the use of observation points distributed vertically, III. I bid., 1, 373-391.
4. Magono, C., K. Kikuchi, T. Kimura and S. Lee, 1963: Investigation on the growth and distribution of natural snow crystals, IV. I bid., 2, 49-78.
5. Nakaya, U., 1954: Snow crystals, natural and artificial. Harvard Univ. Press., 249 pp.