TY  - GEN
AU  - Burggraf, Fred, Ed.
AU  - 
ED  - Ward, Elmer M., ed.
TI  - Soil compaction and  proof-rolling of subgrades
U1  - 625.7 
PY  - 1960///
CY  - Washington, D.C.
PB  - Highway Research Board
KW  - Road Construction -- Collected Works
N1  - Publication 763
ER  -