Palaeontological Sinica (Vol.1 Part I.) Permian Plants Collected By Messrs. Chu Tingoo and Hsu Jui Ling From the La-Shih-Pa and Tien-Lo-Chung Coal-Fields North-East of Chu-Chiang, Kwangtung : China Scientific Books, Online bookstore for scientific, technical and medical books published in Greater China