TY  - RPRT
TI  - Empirically derived learning disability subtypes: a replication attempt and longitudinal patterns over 15 years.
AU  - O Spreen
AU  - R G Haaf
PY  - 1986
DO  - 10.1177/002221948601900308
UR  - https://pubmed.ncbi.nlm.nih.gov/3958606/
ID  - 3958606
ER  -