Organic geochemical study of continuous lacustrine sediments obtained from Kathmandu Valley, central Himalaya: interpretation of paleoenvironmental changes in the late Quaternary - Mampuku, Mami; Yamanaka, Toshiro; Sakai, Harutaka; Fujii, Rie; Maki, Takeshi; Uchida, Masao; Sakai, Hideo; Yahagi, Wataru; Tsutsumi, Hiroaki (Himalayan Journal of Sciences, 2008)