TY  - RPRT
TI  - A free space-time traversal data-logging system for two human subjects.
AU  - M J MacCulloch
AU  - C J Birtles
AU  - S Bond
PY  - 1969
DO  - 10.1007/bf02551729
UR  - https://pubmed.ncbi.nlm.nih.gov/5402069/
ID  - 5402069
ER  -