Scientific publication: 'The Boundary Conditions of the Universe'
1981-1982
1981-1982
1911
1825-1835
1927
1916
circa 1920
1850-1900
1984; 1983
1889
circa 1900
1898
1899
1880-1920
1850-1856
1901
1880-1950
2007
1983
circa 1983
1897
1835
1846
1880-1940
1950
1870-1910
1830-1850
1861 - 1900
circa 1861
1839-1887
circa 1880-1920
circa 1880-1920
1934
circa 1810
1886
1890 - 1900
1840s-1900
1920-1925
circa 1890
circa 1890
circa 1890