| Shelfclass_id | 3.H |
| Sortkey | HARCGRAVE, W. T |
| Authors | W. T. Hardgrave |
| Title | The Relational Model: A Reformulation of Some Mathematical Aspects Using Positional Set Notation: IFSR T.R. No. 25, Version 2 |
| Publisher | University of Maryland |
| Year | 1978 |
| Languages | eng |
| Description | i. 31 p. 29 cm |
| Record date | 20140129 |
| Location | College Park, MD |
| Notes | "This report is distributed for discussion and comments. It should not be copied or estracted..." |