TY  - RPRT
TI  - Interrupted time series analysis: a research technique for evaluating social programs for the elderly.
AU  - R J Calsyn
AU  - E O Fergus
AU  - J L York
PY  - 1977
DO  - 10.1093/geronj/32.1.89
UR  - https://pubmed.ncbi.nlm.nih.gov/830740/
ID  - 830740
ER  -