Books: 3928
Published before 1900: 1611
Published in 1901-1917: 1007
Published in 1918-1940: 776
Published in 1941-1945: 50
Published in 1946-1990: 434
Published since 1991: 50
Periodicals: 91253
Published before 1900: 2184
Published in 1901-1917: 2803
Published in 1918-1940: 8989
Published in 1941-1945: 9324
Published in 1946-1990: 59606
Published since 1991: 8181