ECU Libraries Catalog
- 1900 to 1909 4
- 1910 to 1919 31
- 1920 to 1929 156
- 1930 to 1939 191
- 1940 to 1949 191
- 1950 to 1959 289
- 1960 to 1969 738
- 1970 to 1979 1,267
- 1980 to 1989 2,850
- 1990 to 1999 4,026
- 2000 to 2009 4,126
- 2010 to 2019 1,071
- 2020 to 2022 128