1. O I. G. G. Publication/Creation: S[ão] Paulo : [publisher not identified]. Format: Journal, Newspaper or Serial Access & Availability: Loading
2. O ziemiorodztwie Karpatów. Atlas Author/Creator: Staszic, Stanisław, 1755-1826 Publication/Creation: [Warszarwa] : Wydawn. Geologiczne, [1955] Format: Book Access & Availability: Loading
3. O ziemiorodztwie Karpatów i innych gór i równin Polski Author/Creator: Staszic, Stanisław, 1755-1826 Publication/Creation: Warszawa : Wydawn. Geologiczne, 1955 Format: Book Access & Availability: Loading
4. Oasis in space : earth history from the beginning Author/Creator: Cloud, Preston, 1912-1991 Publication/Creation: New York : W.W. Norton, [1988] Format: Book Edition: 1st edition. Access & Availability: Loading
5. Obras de geología y paleontología Author/Creator: Kraglievich, Lucas, 1886-1932 Publication/Creation: La Plata : Taller de impresiones oficiales, 1940 Format: Book Access & Availability: Loading
6. Observations de m. de Trébra sur l'intérieur des montagnes : précédées d'un plan d'une histoire générale de la minéralogie par m. de Veltheim, avec un discours préliminaire et des notes de m. le baron de Dietrich ... Author/Creator: Trebra, Friedrich Wilhelm Heinrich von, 1740-1819 Publication/Creation: Paris : De l'Imprimerie de Monsieur : Se trouve chez Didot le jeune [et] Didot fils aîné ; A Strasbourg : Chez Treuttel ..., 1787 Format: Book Access & Availability: Loading
7. Observations on the earths, rocks, stones and minerals for some miles about Bristol, and on the nature of the hot-well, and the virtues of its water : by Mr]. Owen Author/Creator: Owen, Edward, of Paternoster Row, London Publication/Creation: London : Printed and sold by W. Johnston ..., 1754 Format: Book Access & Availability: Loading
8. Observations on the geology and zoology of Abyssinia : made during the progress of the British expedition to that country 1867-68 Author/Creator: Blanford, W. T. 1832-1905. (William Thomas) Publication/Creation: London : Macmillan and Co. : R. Clay, Sons, and Taylor, printers, Bread Hill Street, 1870 Format: Book Access & Availability: Loading
9. Observations on the geology, mineralogy, &c., of the Perkiomen Lead Mine in Pennsylvania Author/Creator: Wetherill, John Price, 1794-1853 Publication/Creation: [Philadelphia] : [Printed by J. Harding], [1826] Format: Book Access & Availability: Loading
10. Observations on the geology of southern New Brunswick : made principally during the summer of l864 Author/Creator: Bailey, L. W. 1839-1925. (Loring Woart) Publication/Creation: Fredericton [N.B.] : G.E. Fenety, printer to the Queen's Most Excellent Majesty, 1865 Format: Book Access & Availability: Loading