Correspondence – International Congress of Geologists, 1886-1887
Correspondence – International Congress of Geologists, 1886-1887
Correspondence – Scientific Federation, March 1887-Oct. 1887
Correspondence – Scientific Federation, March 1887-Oct. 1887
Correspondence – Scientific Federation, 1886-1887
Correspondence – Scientific Federation, 1886-1887
Correspondence – Fossils, 1876-1897
Correspondence – Fossils, 1876-1897
Correspondence – Scientific Federation, Feb. 1887-Nov. 1887
Correspondence – Scientific Federation, Feb. 1887-Nov. 1887
Correspondence – Fossils, 1875-1890
Correspondence – Fossils, 1875-1890
Correspondence – Fossils, 1872-1894
Correspondence – Fossils, 1872-1894
Correspondence – Fossils, 1879-1889
Correspondence – Fossils, 1879-1889
Correspondence – Fossils, 1875-1888
Correspondence – Fossils, 1875-1888
Correspondence – Fossils, 1875-1885
Correspondence – Fossils, 1875-1885