TY  - RPRT
TI  - The positional set processor : a tool for data modeling
AU  - Hardgrave, W Terry
AU  - Salazar, Sandra B
PY  - 1981
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 81-2302
DO  - 10.6028/NBS.IR.81-2302
ER  -