TY  - RPRT
TI  - Transparent blocks--an aid in simulation.
AU  - D B Hughes
AU  - R Rodriguez
PY  - 1981
DO  - 10.1016/0360-3016(81)90200-5
UR  - https://pubmed.ncbi.nlm.nih.gov/7333915/
ID  - 7333915
ER  -