TY  - RPRT
TI  - Circular of the Bureau of Standards no. 160: United States government master specification for asphalt for waterproofing and damp proofing
PY  - 1924
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 160
DO  - 10.6028/NBS.CIRC.160
ER  -