1. Zur Entstehung der Grauoeln;Barkkow;Met Zs.,1908
2. Dependence of the forms of natural snow crystals in meteorological conditions;Gold;J. Met.,1954
3. J. P. Kuettner A study of precipitation system by means of snow crystals, synoptic and radar analysis 1958
4. On the growth of snowflakes and graupel;Magono;Sci. Rep. yokohama National Univ., ser. 1,1953
5. On the relation between natural snow crystal forms and the upper air conditions;Murai;Low Temperature Science, Ser, A,1956