Description: The ARIBIB is an on-line database for the astronomical bibliography in the reference format. It contains at present the literature of the following years in the listed formats: 2000/Part 1 - 1969 : Reference format, 1968 - 1954 : Image format, 1953 - 1918 : Index format, 1917 - 1899 : Image format, 1898 - 1881 : Very few tests only. 1880 and earlier: Image format