TY  - RPRT
TI  - Laboratory evaluation of nondestructive methods to measure moisture in built-up roofing systems 
AU  - Knab, Lawrence
AU  - Matheu, Robert
AU  - Jenkins, David
PY  - 1981
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS BSS 131
DO  - 10.6028/NBS.BSS.131
ER  -