TY  - RPRT
TI  - Techniques for the measurement of acoustic impedance of asphalt 
AU  - Mansbach, P A
AU  - Holmer, C I
PY  - 1978
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 78-1541
DO  - 10.6028/NBS.IR.78-1541
ER  -