Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KAIHARA Takuya and HACHIKUBO Akihiro and OZEKI Toshihiro and NISHIMURA Kouichi and AKITAYA Eizi,"Field observation of weak layers of depth hoar, graupel and rime-free crystals",Journal of the Japanese Society of Snow and Ice,03731006,The Japanese Society of Snow and Ice,2011,73,2,133-142,https://cir.nii.ac.jp/crid/1390011461952007808,https://doi.org/10.5331/seppyo.73.2_133