Distribution and Characteristics of Nanotubular Halloysites in the Thach Khoan Area, Phu Tho, Vietnam Bac, Bui ; Dung, Nguyen ; Khang, Luong ; Hung, Khuong ; Lam, Nguyen ; An, Do ; Son, Phan ; Anh, Tran ; Chuong, Doan ; Tinh, Bui Abstract Publication: Minerals Pub Date: July 2018 DOI: 10.3390/min8070290 Bibcode: 2018Mine....8..290B