Preservation Coverage by Query


Can also search for releases (eg, individual papers) or containers (eg, journals).
17,088,483
Known Releases
11,814,954 69.14% preserved and publicly accessible (bright)
2,481,301 14.53% preserved but not publicly accessible (dark)
2,792,228 16.34% no known independent preservation
17,088,483 total


Preservation Coverage by Year



Preservation Coverage by Release Type

Release Type Total Count Coverage
article-journal 14,654,520
article 2,418,148
paper-conference 15,815