@book{ BB11093070, author = "Playfair, John", title = "Illustrations of the Huttonian theory of the earth", publisher = "Readex Microprint", year = "1967", series = "Landmarks of science / ed. by Harold Hartley, Duane H. D. Roller", number = "", URL = "https://ci.nii.ac.jp/ncid/BB11093070" }