Makoto Kumagai

Present State of Geoparks on the Twitter. -Prospectuve study based on Social Network Analysis-

Masaki Suzuki, Hideyuki Itoh, Hanako Onodera, 2017 .

Fails of Shirataki Geopark –Why our geopark received a “yellow card” on the revalidated process-

Makoto Kumagai, Kyohei Sano, Takashi Nakahara, 2017 .

Ion-Beam-Induced White Luminescence of CaF2 Implanted with Both Eu and Tb Ions

Makoto Kumagai, M. Iwaki, Keiko Aono, 1993 .