chỉ đạo dự án, Trần Hữu Sơn, Philippe Le Failler = Catalogue des pétroglyphes du district de Sapa, province de Lào Cai, Vietnam / direction du projet, Trần Hữu Sơn, Philippe Le Failler
[advisors, Le Dung, Tran Quang Tuyen, Pham Hai Bang ; coordinators, Nguyen The Cuong, Nguyen A Phi, Pham Hoang Tuan ; photo by VNA ... [and others] ; editor[s] of English, Dang Xuan Dung, William Tudhope]