PT  - JOURNAL ARTICLE
ED  - ,
TI  - Necessity the mother of invention
DP  - 1997 Jan 15
TA  - Canadian Medical Association Journal
PG  - 156--156
VI  - 156
IP  - 2
4099  - http://www.cmaj.ca/content/156/2/156.4.short
4100  - http://www.cmaj.ca/content/156/2/156.4.full
SO  - CMAJ1997 Jan 15; 156