Smithsonian Open Access Explorer archive
- 2048 (1 records)
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- 2016 (2 records)
- 2015 (3 records)
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- 2008 (8 records)
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- 1994 (15 records)
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- 1978 (45 records)
- 1977 (22 records)
- 1976 (18 records)
- 1975 (31 records)
- 1974 (38 records)
- 1973 (23 records)
- 1972 (41 records)
- 1971 (43 records)
- 1970 (37 records)
- 1969 (38 records)
- 1968 (57 records)
- 1967 (49 records)
- 1966 (74 records)
- 1965 (37 records)
- 1964 (36 records)
- 1963 (38 records)
- 1962 (27 records)
- 1961 (26 records)
- 1960 (25 records)
- 1959 (22 records)
- 1958 (17 records)
- 1957 (25 records)
- 1956 (16 records)
- 1955 (60 records)
- 1954 (32 records)
- 1953 (36 records)
- 1952 (22 records)
- 1951 (23 records)
- 1950 (16 records)
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- 1948 (23 records)
- 1947 (9 records)
- 1946 (23 records)
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- 1944 (20 records)
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- 1926 (13 records)
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- 1923 (8 records)
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- 1919 (7 records)
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- 1915 (17 records)
- 1914 (18 records)
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- 1909 (49 records)
- 1908 (35 records)
- 1907 (18 records)
- 1906 (16 records)
- 1905 (28 records)
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- 1903 (13 records)
- 1902 (21 records)
- 1901 (18 records)
- 1900 (21 records)
- 1899 (16 records)
- 1898 (24 records)
- 1897 (18 records)
- 1896 (11 records)
- 1895 (10 records)
- 1894 (14 records)
- 1893 (10 records)
- 1892 (12 records)
- 1891 (19 records)
- 1890 (17 records)
- 1889 (9 records)
- 1888 (13 records)
- 1887 (25 records)
- 1886 (15 records)
- 1885 (13 records)
- 1884 (28 records)
- 1883 (29 records)
- 1882 (21 records)
- 1881 (12 records)
- 1880 (18 records)
- 1879 (12 records)
- 1878 (20 records)
- 1877 (11 records)
- 1876 (12 records)
- 1875 (6 records)
- 1874 (12 records)
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- 1870 (2 records)
- 1869 (2 records)
- 1868 (4 records)
- 1867 (3 records)
- 1866 (2 records)
- 1865 (4 records)
- 1864 (3 records)
- 1863 (1 records)
- 1862 (2 records)
- 1861 (4 records)
- 1860 (3 records)
- 1859 (3 records)
- 1858 (6 records)
- 1857 (1 records)
- 1856 (1 records)
- 1855 (1 records)
- 1854 (4 records)
- 1853 (2 records)
- 1852 (3 records)
- 1850 (3 records)
- 1847 (2 records)
- 1845 (3 records)
- 1844 (1 records)
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- 1840 (4 records)
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- 1836 (2 records)
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- 1833 (1 records)
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- 1829 (1 records)
- 1828 (2 records)
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- 1814 (1 records)
- 1810 (2 records)
- 1809 (1 records)
- 1808 (2 records)
- 1806 (2 records)
- 1801 (1 records)
- 1798 (2 records)
- 1795 (1 records)
- 1787 (1 records)
- 1784 (1 records)
- 1781 (1 records)
- 1780 (1 records)
- 1777 (1 records)
- 1773 (2 records)
- 1772 (1 records)
- 1770 (1 records)
- 1764 (1 records)
- 1761 (2 records)
- 1759 (1 records)
- 1757 (1 records)
- 1755 (1 records)
- 1749 (1 records)
- 1745 (2 records)
- 1741 (1 records)
- 1740 (1 records)
- 1738 (1 records)
- 1730 (1 records)
- 1727 (4 records)
- 1726 (1 records)
- 1725 (2 records)
- 1722 (2 records)
- 1720 (1 records)
- 1719 (1 records)
- 1714 (1 records)
- 1713 (1 records)
- 1711 (2 records)
- 1710 (1 records)
- 1707 (1 records)
- 1706 (1 records)
- 1704 (1 records)
- 1700 (3 records)
- 1690 (1 records)
- 1671 (1 records)
- 1667 (1 records)
- 1628 (1 records)
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- 1599 (1 records)
- 1589 (1 records)
- 1580 (2 records)
- 1575 (1 records)
- 1190 (1 records)