Media type: E-Article Title: On an algebra for historical relational databases : two views : two views Contributor: Clifford, James; Tansel, Abdullah Uz Published: Association for Computing Machinery (ACM), 1985 Published in: ACM SIGMOD Record, 14 (1985) 4, Seite 247-265 Language: English DOI: 10.1145/971699.318922 ISSN: 0163-5808 Keywords: Information Systems ; Software Origination: Footnote: Access State: Open Access