TY - RPRT TI - A cognitiveview and a probability-orientedmodel obiological classification. AU - R A Davidson AU - R A Dunn PY - 1969 DO - 10.1111/j.1749-6632.1969.tb34083.x UR - https://pubmed.ncbi.nlm.nih.gov/5260055/ ID - 5260055 ER -