TY  - RPRT
TI  - Materials used in waterproofing systems on underground structures : progress report
AU  - Walton, William W
AU  - Boone, Thomas H
AU  - Cullen, William C
AU  - Turner, Austin J
PY  - 1962
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS report ; 7542
DO  - 10.6028/NBS.RPT.7542
ER  -