Kamonmooneechote, T.; Kaewrudee, S.; Soontrapa, S.; Chongsomchai, C.; Chumworathayi, B.; Temtanakitpaisan, T. Menstrual Patterns Among Upper Secondary School Students, Khon Kaen, Thailand. Thai J Obstet Gynaecol 2014, 22, 52-58.