TY  - RPRT
TI  - The visual instruction system.
AU  - J E Seat
AU  - C A Wrisberg
PY  - 1996
DO  - 10.1080/02701367.1996.10607932
UR  - https://pubmed.ncbi.nlm.nih.gov/8736001/
ID  - 8736001
ER  -