Porter, Roy S. Charles Lyell and the Principles of the History of Geology. The British Journal for the History of Science. 1976, 32 (2): 91–103. JSTOR 4025798. doi:10.1017/s0007087400014692(英语).
Porter, Roy S. Charles Lyell and the Principles of the History of Geology. The British Journal for the History of Science. 1976, 32 (2): 91–103. JSTOR 4025798. doi:10.1017/s0007087400014692(英语).