On the semantics of the relational data model
By: by Hans Albrecht Schmid, J. Richard Swenson.
Contributors: Swenson, J. Richard; University of Toronto. Computer Systems Research Group.
Series: Technical report -- CSRG-58; Technical report CSRG (University of Toronto.  Computer Systems Research Group) -- 58
Publisher: Computer Systems Research Group, University of Toronto
Published: 1975
Place of publication: Toronto
Language: eng
Number of pages: 48
Subjects: Electronic data processing; Database management
Notes: Bibliography: p. 47-48.