TY  - RPRT
TI  - Directional forces.
AU  - L L Merrifield
AU  - J J Cross
PY  - 1970
DO  - 10.1016/0002-9416(70)90164-8
UR  - https://pubmed.ncbi.nlm.nih.gov/5265828/
ID  - 5265828
ER  -