TY  - RPRT
TI  - Hierarchical attributes for categorization.
AU  - D J Bearison
AU  - I E Sigel
PY  - 1968
DO  - 10.2466/pms.1968.27.1.147
UR  - https://pubmed.ncbi.nlm.nih.gov/5685684/
ID  - 5685684
ER  -