TY  - RPRT
TI  - Circular of the Bureau of Standards no. 180: United States government master specification for the installation of metal flashings with built-up bituminous roofing
PY  - 1924
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 180
DO  - 10.6028/NBS.CIRC.180
ER  -