なぜ?どうして?科学のお話. 2年生 / 大山光晴総合監修;渡辺利江, 入澤宣幸, 甲斐望文.

Title: Naze? dōshite? kagaku no ohanashi. 2-nensei / Ōyama Mitsuharu sōgō kanshū ; Watanabe Rie, Irisawa Noriyuki, Kai Nozomi bun
Published: Tōkyō : Gakken Kyōiku Shuppan, 2009.
Physical Description: 183 pages : illustrations (some color) ; 21 cm
Additional Creators: Ōyama, Mitsuharu, Watanabe, Rie, Irisawa, Noriyuki, Kai, Nozomi, 大山光晴, 渡辺利江, 入澤宣幸, and 甲斐望