TY  - RPRT
TI  - Access systems of heavy construction vehicles: Parameters, problems and pointers.
AU  - D B Couch
AU  - T M Fraser
PY  - 1981
DO  - 10.1016/0003-6870(81)90177-0
UR  - https://pubmed.ncbi.nlm.nih.gov/15676403/
ID  - 15676403
ER  -