TY  - RPRT
TI  - Direct core materials.
AU  - Paul H Wilson
AU  - Nigel L Fisher
AU  - David W Bartlett
PY  - 2003
DO  - 10.12968/denu.2003.30.7.362
UR  - https://pubmed.ncbi.nlm.nih.gov/14558201/
ID  - 14558201
ER  -