PT  - JOURNAL ARTICLE
AU  - J M Irving
AU  - M P Ryan
TI  - GPASS.
DP  - 1990 May 01
TA  - British Journal of General Practice
PG  - 218--218
VI  - 40
IP  - 334
4099  - http://bjgp.org/content/40/334/218.4.short
4100  - http://bjgp.org/content/40/334/218.4.full
SO  - Br J Gen Pract1990 May 01; 40