TY  - RPRT
TI  - A planning model for unifying information modeling languages for product data exchange specification (PDES) 
AU  - Tyler, Joan
PY  - 1990
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST IR 90-4234
DO  - 10.6028/NIST.IR.90-4234
ER  -