Elements of geology : prepared for the use of schools and colleges / by W. S. W. Ruschenberger ; from the text of F. S. Beudant, Milne Edwards, and Achille Comté
Ruschenberger, W. S. W. (William Samuel Waithman), 1807-1895; Beudant, F. S. (François Sulpice), 1787-1850; Milne-Edwards, H. (Henri), 1800-1885; Comté, Achille (Achille Joseph), 1802-1866