Registration No. 4-17 [Chemical Education] "The Effect of the Nucleophile/Electrophile Reaction Guide...." = 9138
Registration No. 4-18 [Chemical Education] "Probability of the appearence of the figures in TETRIS(R)...." = 16907
Registration No. 4-19 [Teaching Materials for Chemical Experiment] "Purification of water for teaching...." = 19123
When you click on "Registration No." at each article. This allows you to view detailed statistic data of the article. (Only domain name is written in Japanese.)