a study on the history of the northern frontier in China during the middle ages 瀚海金河：中古北疆历史考索：a study on the history of the northern frontier in China during the middle ages a study on the history of modern medicine in China a study on the history of Chinese migration to Thailand in Qing dynasty Cultural history of the senses: in the middle ages a history of the church in the middle ages a study of field of literature in China's middle ages