TY  - RPRT
TI  - Circular of the Bureau of Standards no. 231: recommended specification for quicklime sand hydrated lime for use in the purification of water
PY  - 1925
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 231
DO  - 10.6028/NBS.CIRC.231
ER  -