@misc{776071, author = {Joan Tyler}, title = {A Planning Model for Unifying Information Modeling Languages for Product Data Specification (PDES)}, year = {1990}, month = {1990-01-01 00:01:00}, publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD}, language = {en}, }