TY  - RPRT
TI  - Circular of the Bureau of Standards no. 443: Maintenance of elevator hoistway and car enclosures and equipment
PY  - 1943
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 443
DO  - 10.6028/NBS.CIRC.443
ER  -