TY  - RPRT
TI  - Is look-back doing the job?
AU  - M P Busch
AU  - S M Samson
AU  - H A Perkins
DO  - 10.1046/j.1537-2995.1987.27688071709.x
UR  - https://pubmed.ncbi.nlm.nih.gov/3686664/
ID  - 3686664
ER  -