TY  - RPRT
TI  - Impact attenuation performance of surfaces installed under playground equipment 
AU  - Mahajan, Bal M
PY  - 1979
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 79-1707
DO  - 10.6028/NBS.IR.79-1707
ER  -