TY  - RPRT
TI  - The ceiling-retractable service column.
AU  - R J Wilder
AU  - G R Williams
PY  - 1981
DO  - 10.1001/jama.1981.03320130013008
UR  - https://pubmed.ncbi.nlm.nih.gov/7265438/
ID  - 7265438
ER  -