Coba jelasin Daftar pustaka dari Principles of Geology dong

1st edition, London: John Murray. Vol 1, Jan. 1830 - Vol 2, Jan. 1832 - Vol 3, May 1833

2nd edition, London: John Murray. Vol 1, 1832 - Vol 2, Jan. 1833

3rd edition, 4 vols. London: John Murray. May 1834

4th edition, 3 vols. London: John Murray, 1835. Vol 1 - Vol 2 - Vol 3

5th edition, 4 vols. London: John Murray, 1837. Vol 1 - Vol 2 - Vol 3 - Vol 4

6th edition, 3 vols. June 1840

7th edition, 1 vol. Feb. 1847

8th edition, 1 vol. May 1850

9th edition, 1 vol. 1853

10th edition, 2 vols. 1866–68

11th edition, 2 vols. 1872

12th edition, 2 vols. 1875. Vol 1 - Vol 2 (published posthumously)